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to, or in substitution for, an insurance policy. Thus the various types of options would be as follows:

(a) A deferred annuity or equivalent cash payment with a considerable benefit in the event of death while

in service to be obtained from insurance companies by means of "endowment assurance" policies of varied types.

(b) A deferred annuity or equivalent cash payment with return of accumulated contributions in the event of death while in service-to be obtained from insurance companies by means of a “sinking fund" policy (or, if necessary, in individual cases by separate investment as above).

(c) A deferred annuity without any return of premiums in the event of death while in service-to be obtained from insurance companies.

V. Ownership of Benefit.-(a) The governing body should hold the policy or other equivalent accrued benefit in trust for the beneficiary so long as he remains at the institution, and the beneficiary should execute some form of legal document which would enable the governing body so to do.

(b) On the transfer of a beneficiary from one institution to another within the federated system, the whole of the accrued benefit should be transferred to the second institution.

(c) In the event of a beneficiary leaving an institution before the retiring age, for any reason other than that indicated in (b) above, he should have the right to the whole of the accrued benefit, but the governing body should have the right to determine how the accrued benefit should be given.

The advisory committee states that universities and colleges would be prepared to inaugurate a superannuation system on the basis of the foregoing principles, but, as in most cases increased outlay will thereby be involved ultimately, it is unreasonable to expect them to adopt the proposals until they know the amount of the assistance they may expect to receive by way of grant. The committee therefore makes recommendations for a further distribution of the money held in reserve.

Grants are made to thirteen universities and colleges varying from 1000l. each in the case of the Universities of Liverpool and Manchester, to 300l. each in the case of Bedford College, London, London School of Economics, East London College, and Reading University College. The colleges at Nottingham and Southampton do not receive additional grants.

The additional grants now recommended, together with those announced in March, 1912, dispose of a yearly sum of 148,000l. out of the 149,000l. available. The committee recommends that the annual balance of 1000l., together with the balance of 2550l. from previous Exchequer grants, should be held over to meet contingencies.

UNIVERSITY AND EDUCATIONAL

INTELLIGENCE.

BIRMINGHAM. The Lord Mayor of Birmingham has opened a fund for the establishment of a memorial to the late Vice-Chancellor, Alderman C. G. Beale, whose services to the city were such as to demand a permanent monument to his name. It is proposed to devote the money subscribed to two objects, both of which would certainly have had the approval of the late Vice-Chancellor, viz. the endowment of a chair in the University (to be called the Beale chair), and the equipment of one of the rooms in the new Natural History Museum of the city with a collection of British birds and their nests in natural surroundings. Already promises to the amount of 9000l. have been

received, including one donation of 5000l., earmarked for the Beale chair, from that most generous friend of the University Sir Charles Holcroft.

CAMBRIDGE.-The General Board of Studies will

proceed shortly to appoint a University lecturer in the philosophy of religion. The appointment is for three years from October 1, 1913. The annual stipend is tool. Candidates are requested to send their applications to the Vice-Chancellor, with testimonials, if they think fit, on or before Friday, April 11.

Mr. A. Harker has been nominated to represent the University at the twelfth International Geological Congress to be held in Canada in August next.

OXFORD.-Sir William Mitchell Ramsay will deliver the Romanes lecture at the Sheldonian Theatre on Thursday, May 8, at 3 p.m. The subject of the lecture is The Imperial Peace."

Mr. R. B. Bourdillon, lecturer in chemistry at Balliol College, has been elected to a fellowship in chemistry on the teaching staff of University College.

The degree of M.A. has been conferred by a decree of Convocation on Prof. W. H. Perkin, F.R.S., fellow of Magdalen College, the recently elected Waynflete professor of chemistry.

At the same Convocation, the statute altering the constitution of Congregation by abolishing the qualification of residence, and making other changes with the view of confining the membership to the “teaching and administrative elements in the University and the colleges," passed its final stage by 77 votes to 49.

In the Educational Supplement of The Times of March 4 an important letter appears from Prof. Poulton, F.R.S., pointing out that the extension of the scientific departments of the University was one of the principal objects had in view by the promoters of the original purchase for the University of the ground known as the Parks. The letter directs attention to a scheme which was devised some years ago, though not accepted by the University, in accordance with which a space of ten or eleven acres adjoining the museum at the south-west angle of the Parks would be definitely allocated to the purposes of the scientific departments at present existing or to be established in future. This would leave six-sevenths of the present open space untouched and unthreatened by building.

SHEFFIELD. Dr. Sophia M. V. Witts has been appointed to the newly instituted post of lady tutor in

anatomy.

MR. AUGUSTINE HENRY, reader in forestry, University of Cambridge, has been appointed to the professorship of forestry recently established in the Royal College of Science for Ireland.

DR. A. R. FORSYTH, F.R.S., formerly Sadlerian professor of pure mathematics in the University of Cambridge, has been appointed chief professor of mathematics at the Imperial College of Science and Technology, South Kensington.

As announced already, a course of four public lectures on the theory of the solid state, will be delivered at University College (University of London), by Prof. W. Nernst, director of the Institute of Physical Chemistry in the University of Berlin, at 6 p.m. to-day, March 6, and at 5 p.m. on March 7, 10, and II. The chairman at the first lecture will be Sir William Ramsay, K.C.B.

Ar the annual meeting of the court of governors of the Middlesex Hospital, on February 27, Prince Alexander of Teck, in moving the adoption of the report, announced an anonymous gift of about

10,000l. The object of the gift is to defray the cost of erecting a new pathological block and institute of hygiene. The scheme is one which the governors have been anxious to carry out for some time, as the present accommodation is wholly inadequate, but lack of funds has hitherto proved an insurmountable barrier to progress in this direction. The plans have been prepared, and it is hoped the work will be started almost immediately.

Ar the meeting of the executive committee of the Carnegie Foundation for the Advancement of Teaching, held on February 11, it was announced that Mr. Andrew Carnegie had given an additional 250,000l. to the foundation. The gift is in the form of 4 per cent. bonds and the income is to be set aside for special investigation relative to the purposes of the original foundation of pensioning college professors. The money is to be devoted to the endowment of a division of educational inquiry and makes permanent provision for studies hitherto conducted by the foundation out of its general fund. It is the plan of the | trustees to proceed with the new endowment to make ther studies similar to those already published conrning medical education and in particular to study gal ducation in its relation to the supply of lawyers and the cost of legal process.

As appeal on behalf of the British and Foreign Blind Association, 206 Great Portland Street, London, W., signed by four blind members of the executive council, including Mr. H. M. Taylor, F.R.S., is being circulated. One of the chief objects of the association is the maintenance of a printing press of works in embossed type; and properly to carry out this and other good works the council finds that extended premises are necessary. The sum of 10,000l. has been expended in carrying out part of the work entailed by the scheme for a new building, and the completion of the work, including adequate equip meni, necessitates the raising of a further sum of 20,000l. The council is anxious that the invested funds of the association, producing an annual income of some 400l., should not be touched. To maintain the work on an enlarged scale an increase of 1000l. in annual subscriptions is needed. Donations or subscriptions should be sent to the honorary treasurer, Mr. Douglas A. Howden, or to the secretary-general.

THE report of the committee of University College, London, for the year ending last month is full of interesting particulars of the manifold activities of the institution. The total number of students during the session 1911-12 was 1679, being an increase of 79 over that of the preceding session. Of these students 403 were engaged in post-graduate study and research. In the faculty of science there were 392 students, and in engineering 174. Of the 403 postgraduate and research students, 117 were women. There were 710 registered internal students of the University of London, compared with 678 in the previous year. We notice that the sums promised and paid, together with interest on deposit and rents, for the new chemical laboratories, amounted in July last to upwards of 38,000l. A tender for the erection of the fabric at a cost of 39,000l. has been accepted, and the work is being pushed forward. A sum of about 28,000l. will be required to complete the laboratories, and it is earnestly hoped that the necessary amount will be speedily forthcoming, so that the completion of the scheme and the opening of the laboratories may not be delayed.

THE erection of new chemical laboratories is not the only important step in progress for the development of the buildings of University College, London. The recently published report of the committee of the

college gives, in addition to an account of the formal opening last December of the new Pharmacology Institute, particulars of the plans being adopted to provide a great hall for examinations and ceremonial occasions. The site of All Saints' Church, Gordon Square, the west wall of which adjoins the Carey Foster Laboratory, has been acquired at a cost of 5900l., which, together with legal expenses, has been provided temporarily from current income, pending the provision of the necessary sum. The Ecclesiastical Commissioners have approved the scheme for the reconstruction of the existing church building. Under this scheme the old building will be so altered as to provide a hall capable of accommodating 1100 persons. The purchase of the site, together with the expenses of reconstruction and refitting, will involve an expenditure of 10,000l.; it is desirable to provide an organ, in addition to the ordinary fittings at a cost of 2000l., making the total cost 12,000l.

SOCIETIES AND ACADEMIES.

LONDON.

Royal Society, February 27.—Sir Archibald Geikie, K.C.B., president, in the chair.-F. Soddy: The periodic law from the point of view of recent results in radio-activity.-C. F. Jenkin and D. R. Pye: The thermal_properties of carbonic acid at low temperatures. The paper describes a series of experiments made in the engineering laboratory at Oxford, undertaken with the object of checking by direct measurements the accuracy of the accepted CO, entropytemperature diagram, due to Mollier, and of extending the diagram to lower temperatures, i.e. from -30° C. to -50° C.-E. Roberts: Re-reductions of Dover tidal observations, 1883-4, &c.-Prof. F. Keeble, Dr. E. F. Armstrong, and W. N. Jones: The formation of anthocyan pigments in plants. Part iv., The chromogens. The results of the experiments described in this paper lend support to the hypothesis that the anthocyan pigments of plants are produced by the oxidation of colourless chromogens. Under certain conditions a coloured flower may be caused to reverse its pigmentforming process and to reduce the pigment which it contains to a colourless state. By again changing the conditions the pigment-forming mechanism may be made to resume activity and to give rise to pigments identical in colour with those of the normal intact flower. Whether the flower forms pigment or remains colourless depends on the degree of hydration of its tissues. If water be withdrawn from the tissues oxydase activity falls off, the activity of "reducingbodies" becomes increased-actually or relatively pigment formation is inhibited, and the pigment in existence already is reduced to chromogen. The flower becomes colourless. If water be supplied to the decolorised tissues, oxydase resumes its activity and chromogens are oxidised to pigments.-W. N. Jones: The formation of the anthocyan pigments of plants. Part v., The chromogens of white flowers. This paper, which deals with the biochemistry of the pigment-forming mechanism contained in white flowers, is a continuation of the work summarised in part. iv. of the present series of communications. As shown in the latter paper, the pigments of flowers may be reduced to the state of colourless chromogens and may be re-formed by artificial means from those chromogens. In the present paper it is shown that chromogens may be obtained from some white flowers and may be caused by similar treatment to give rise to pigments.-Mabel P. FitzGerald: The changes in the breathing and the blood at various high altitudes. The observations described in the paper were made during the summer of 1911 on persons residing in

many years ago, but hitherto unnoticed; the other an Ostracod, of which one specimen only was found in brackish water in Sussex. The latter formed the type of a new genus, and possibly also a new family.

towns, mining camps, &c., at various altitudes from 5000 to 14,000 ft. in the Colorado portion of the Rocky Mountains. The main conclusions reached are as follows: (1) The volume of air breathed per unit mass of CO2 produced by the body is always increased in persons acclimatised at high altitudes. The mean increase of breathing is such as to produce a fall of about 42 mm. (or roughly 10 per cent. of the normal for sea-level) in the partial pressure of CO, in the air normally present in the lung alveoli for every 100 mm. of fall in the barometric pressure. Both men and women show this fall, after allowance is made for the normal difference in the alveolar CO2 pressure of men and women. (2) The percentage of hæmoglobin in the blood of acclimatised persons is likewise increased, the mean increase being about 10 per cent. of the normal at sea-level in men for every 100 mm. of diminution in the barometric pressure. Both men and women show this fall. (3) It may take some weeks for these changes to establish themselves fully in per-present date, incidentally showing the obligation under sons passing to a high altitude or to disappear in persons passing to sea-level.

Zoological Society, February 18.-Prof. E. A. Minchin, F.R.S., vice-president, in the chair.-H. B. Preston Diagnoses of new species and varieties of agnathous mollusca from equatorial Africa. The author directed attention to the enormous field for conchological research awaiting the student of this very fruitful region, and stated that in many parts each range of hills appeared to have, to a certain extent, its own special molluscan fauna, often characterised by certain local and peculiar phases common not only to the species but also to the genera occurring in that particular locality.-W. A. Lamborn: Notes on the habits of certain reptiles in the Lagos district. An account was given of the habits of the lizard Agama colonorum, especially relating to courtship, polygamous practices, and combativeness, and of native superstitions in regard to chameleons. Observations were also recorded on a batch of eggs of a crocodile, probably Crocodilus niloticus, on their hatching, on the behaviour of the newly hatched young, and on the native beliefs as to the habits of the mother crocodile.-Dr. R. Broom: The Gorgonopsia, a suborder of the mammal-like reptiles. Descriptions of a new genus and two new species of Gorgonopsids, based on well-preserved skulls discovered by Mr. S. H. Haughton and the Rev. J. H. Whaits. The Gorgonopsia were re-established as a distinct suborder of the Therapsida, and a list of the characters distinguishing the Gorgonopsians from the Therocephalians was given. Dr. R. Broom: The South African Rhynchocephaloid reptile, Euparkeria capensis. A detailed account of this species was given, and its affinities with allied forms discussed. The evidence at present seemed to show that Euparkeria was to be regarded as a member of an order of generalised Rhynchocephaloid reptiles, and might be taken as the type of a most important suborder of this group containing the ancestors of the Dinosaurs, the Pterodactyles, and the birds.-R. Lydekker: The heads of a male and female dwarf buffalo shot by Lieut. A. W. Hunt, R.N., in Southern Nigeria. The name Bos caffer hunti was suggested. This race agrees with the Gambian B. c. planiceros in that the adult bulls are darker than cows, but is of smaller size, with the orange band on the throat narrower. Mr. Lvdekker also proposed the name B. c. beddingtoni for a mounted bull of a red dwarf buffalo from Ashanti, mainly on the ground that it is cut off from the red Congo B. c. nanus by the above-mentioned Nigerian race.-Dr. G. Stewardson Brady: Descriptions of two British Entomostraca apparently new to science. One was a Diaptomus, obtained abundantly in Loch Ness

Institution of Mining and Metallurgy, February 20.-Mr. Edward Hooper, president, in the chair.-J. Douglas Historical sketch of the Copper Queen Mines and Works, Arizona, U.S.A.-A. Notman: Geology of the Bisbee ore deposits.-C. Legrand: The power plant at Bisbee, Arizona; the power plant at Douglas, Arizona.-G. B. Lee: Reduction works at Douglas, Arizona. These five papers, dealing with different aspects of the famous Copper Queen property, are the amplification of a lecture delivered by Dr. Douglas before a special meeting of the institution in a previous session. The historical portion traces the development of the copper-producing industry in the Far West from its origin in about 1870 until the

which mining is placed to the great railroad enterprises that have linked up the two sides of the continent. With regard to the geological surveys that have, more especially in recent years, supplemented the earlier empirical development work, Dr. Douglas points out that even in recent years the strictly exploratory work represents about one-fourth of the cost of the total mining operations, a proportion which it is hoped will be reduced in the future as the result of more accurate geological research. Mr. Notman's contribution to the quintet of papers shows that the system of geological survey has been conducted in a thorough manner, but that there are still unsolved problems with regard to many parts of the field, opening up possibilities of valuable discoveries in the sedimentary rocks of greater age and the intrusive igneous rock. The two papers dealing with the power installation at Bisbee and Douglas show that the consolidation of the various properties now comprised in the Copper Queen group has enabled a considerable improvement to be effected in this department. A feature of the reduction works is the attempt that has been made to deal with the problem of dust losses in the smoke from the converters and blast-furnaces. —R. Davey : Copper-smelting methods at Bogoslowsk, Perm, Russia. A special interest attaches to the works described in this paper, as they were among the earliest in the eastern hemisphere to adopt the Bessemerising of copper matte, the plant dating back to 1885. A modern plant is now in course of erection to supersede the somewhat out-of-date methods hitherto in vogue, which have accounted nevertheless for a considerable yearly production.

PARIS.

Academy of Sciences, February 24.-M. F. Guyon in the chair.-Paul Appell: Functional equation for the relative equilibrium of a homogeneous liquid in rotation under the Newtonian attraction of its parts.-H. Le Chatelier and Mlle. Cavaignac: The fusibility of the natural fatty bodies. From the study of the melting and solidifying points of two fats, vegetaline and stearin, it is shown that the phenomenon of change of state is strictly reversible. The exact temperature of transformation can be determined with an accuracy of 0.1° C., but the experiments require much time. There is no evidence of the existence of polymorphic bodies, the only peculiarity found being that the velocity of change of state is extremely slow.-Stuart Menteath and H. Douvillé: The Eocene deposits of Bos d'Arros.-Pierre Duhem: The stability of thermal equilibrium.-W. Kilian and Ch. Pussenot: A detailed analysis of the dislocations of the Eastern Briançonnais.-E. Bompiani: The configurations of Laplace. --Gustave Sannia: Some new properties of the char

acteristics of partial linear equations of the first order
in two variables.-T. de Donder: The theorem of in-
dependence of Hilbert.-L. Crussard: The propagation
and alteration of waves of shock.-Alexandre Sée : A
new principle of longitudinal stability of aeroplanes.-
Albert Turpain: The recording of time signals and
Hertzian telegrams with the aid of a Morse apparatus.
A detailed description of two types of galvanometer
used, in conjunction with a system of relays, in work-
ing recording apparatus.-V. Crémieu: The effects of
flexion at the points of attachment of the wire of a
torsion balance. A continuation of a previous paper
on the same subject, with suggested applications to
seismographs, dynamometers, and microbalances.-E.
Briner and A. Kuhne: The transformation undergone
by heated calcium carbide. When calcium carbide is
heated in a closed vessel at Sco° to 1000° C. the only
transformation it undergoes is a decomposition into its
elements. There is no evidence in support of the view
that a subcarbide is formed.-E. Fouard: Differential
tonometry of solutions and the theory of Arrhenius.
The results with sugar are not in accord with the
current theories of solution.-H. Colin and A.
Sénéchal: The oxidation of complex cobalto-organic
compounds. A study of the velocity of oxidation by
air of an alkaline cobalto-glycerol solution.-Marc
Bridel: The presence of gentiopicrin, gentianose, and
saccharose in the fresh roots of Gentiana punctata.
--R. Dalimier: The actions of the arseno-aromatic
compounds (606 and neo-salvarsan) on the hæmoglobin
of the blood. Dioxydiamido-arseno-benzene ("606") is
without action of the hæmoglobin of the blood either
in vitro or in vivo. Neo-salvarsan (sodium dioxydiamido-
arseno-benzene sulphoxylate), on the contrary, has a
marked action of the hæmoglobin. In vitro it causes
hæmolysis and reduces oxyhæmoglobin; in vivo the
reduction is not produced, and the hæmolysis rapidly
vanishes. For these reasons there would appear to
be reasons against the use of neo-salvarsan in certain
cases.-V. Grégoire: The telophase and the prophase
in somatic caryokinesis.-L. Bounoure: Observations
on the post-embryonic evolution of Dytiscus margin-
alis.-A. Ch. Hollande: The figured bodies of the
Dotoplasm of the cenocytes of insects.-P. Chaussé :
The suspension in air of the virulent particles obtained
by liquid pulverisation. A solution of a dyestuff
(methyl violet) was sprayed into a room and experi-
ments made on the time of suspension and transport-
ability of the particles. Similar experiments have been
made with tuberculous virus.-Albert Berthelot: Re-

searches on Proteus vulgaris considered as a producer
of indol.-Em. Bourquelot and J. Coirre: Some new
data on the reversibility of the ferment action of
emulsion.-I. Stoklasa, J. Sebor, and V. Zdobnicky: The
synthesis of sugars by radio-active emanations.
the interaction of carbon dioxide and nascent hydrogen
in the presence of radium emanations and potassium
bicarbonate reducing sugars were obtained.

BOOKS RECEIVED.

Bv

Chemistry of the Oil Industries. By J. E. Southcombe. Pp. xi+204. (London: Constable and Co., Ltd.) 7s. 6d. net.

A Synopsis of the Elementary Theory of Heat and Heat Engines. By J. Case. Pp. iii+65. (Cambridge W. Heffer and Sons, Ltd.) 2s. 6d. net.

An Introduction to the Physics and Chemistry of Colloids. By E. Hatschek. Pp. ix+94. (London: J. and A. Churchill.)_2s. 6d. net.

Vicious Circles in Disease. By Dr. J. B. Hurry. Second and enlarged edition. Pp. xiv +280. (London J. and A. Churchill.) 7s. 6d. net.

On Aristotle as a Biologist, with a Prooemion on Herbert Spencer. By Prof. D'Arcy W. Thompson. Pp. 31. (Oxford: Clarendon Press.)

IS. net.

The Physical and Political School Atlas. By J. G.
Bartholomew. Pp. xvi +32. (Oxford University
Press.) IS. net.
Future. By Lieut.-Col. W. Sedg-
Pp. 217. (London: F. Griffiths.)

Man and His wick. Part ii. 6s. net.

The Year-Book of the Scientific and Learned Societies of Great Britain and Ireland. Twenty-ninth Annual Issue. Pp. vii+373. (London: C. Griffin and Co., Ltd.) 7s. 6d.

Union of South Africa. Mines Department. Annual Reports for 1911. Part iii., Geological Survey. Pp. 113+maps + plates. (Pretoria: Government Printing and Stationery Office.) 7s. 6d.

Life in Ancient India in the Age of the Mantras. By P. T. Srinivas Iyengar. Pp. x+140. (Madras: S Varadachari and Co.)

Anales del Museo Nacional de Historia Natural de Buenos Aires. Tomo xxiii. Pp. 415+ plates. (Buenos Aires.)

Records of the Survey of India. Vol ii., 1910–11. Pp. iii+157+xi maps. (Calcutta Superintendent Government Printing, India.) 6s.

The Science of Human Behaviour. Biological and Psychological Foundations. By Dr. M. Parmelee. Pp. xvii +443. (London: Macmillan and Co., Ltd.)

8s. 6d. net.

Ausführung qualitativer Analysen. By W. Biltz. Pp. xi+139. (Leipzig Akademische Verlagsgesell

schaft m.b.H.)

Geological Survey of Alabama. Iron Making in Alabama. By W. B. Phillips. Third edition. Pp. 254+ xxxi plates. (Alabama: University.)

Pharmakognostischer Atlas. By Dr. L. Koch.
Zweiter Teil der mikroskopischen Analyse der Drogen-
pulver. Zweiter Band. 2 Lief. (Leipzig: Gebrüder
Borntraeger.) 3.50 marks.

Taschenbuch für Mathematiker und Physiker, 3
Jahrgang,__ 1913.
Edited by F. Auerbach and R.
Rothe. Pp. x+463. (Leipzig and Berlin: B. G.
Teubner.) 6 marks.

Exercises in Gas Analysis. By Dr. H. Franzen.
Translated by Dr. T. Callan. Pp. vii+ 120. (London:
Blackie and Son, Ltd.) 2s. 6d. net.

Vorlesungen über die Theorie der Wärmestrahlung. By Dr. M. Planck. Zweite Auflage. Pp. xii+206.

Illustrated Catalogue of Physical Apparatus. Pp. (Leipzig: J. A. Barth.) 7 marks. 1032+ xix. (London: F. E. Becker and Co.)

Three Years in the Libyan Desert. Travels, Discoveries, and Excavations of the Menas Expedition (Kaufmann Expedition). By J. C. E. Falls. Translated by E. Lee. Pp. xii+356 + plates. (London: T. F. Unwin.) 15s. net.

Die Synchytrien Studien zu einer Monographie der Gattung. By Dr. G. Tobler. Pp. ii+98 +4 plates. (Jena: G. Fischer.) 5 marks.

Die Ontogenie der Primatenzähne: Versuch einer Lösung der Gebissprobleme. By Prof. L. Bolk. Pp. vi + 122+2 plates. (Jena: G. Fischer.) 5 marks.

Lehrbuch der Thermodynamik. By Drs. J. D. v. d. Waals and P. Kohnstamm. Zweiter Teil. Pp. xvi+ 646. (Leipzig: J. A. Barth.) 12 marks.

Year-Book of the Royal Society, 1913. Pp. iii + 258. (London: Harrison and Sons.) 5s.

Qualitative Determination of Organic Compounds. By J. W. Shepherd. Pp. xvi+348. (London: W. B. Clive.) 6s. 6d.

Wild Flowers as They Grow. By H. E. Corke and G. C. Nuttall. Fifth series. Pp. viii+ 200+ plates. (London: Cassell and Co., Ltd.) 5s. net.

Trees and How They Grow. By G. C. Nuttall and

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A First Book of Electricity and Magnetism. By W. P. Maycock. Fourth edition. Pp. xxii +351. (London: Whittaker and Co.) 2s. 6d. net.

The Design of Alternating Current Machinery. By J. R. Barr and R. D. Archibald. Pp. xvi + 496 + xvi plates. (London: Whittaker and Co.) 12s. 6d. net. Dahlias. By G. Gordon. Pp. xi+115+ viii coloured plates. (London and Edinburgh : T. C. and E. C. Jack.) IS. 6d. net.

Practical Bird-keeping.

Edited by J. L. Bonhote. Pp. xvi+ 142+ plates. (London: West, Newman and Co.) 5s. net.

Das Relativitätsprinzip. By Dr. M. Laue. Zweite Auflage. Pp. xii+272. (Braunschweig: F. Vieweg und Sohn.) 8 marks.

Reports of the Committee on Electrical Standards appointed by the British Association for the Advancement of Science. Reprinted by Permission of the Council. A Record of the History of Absolute Units" and of Lord Kelvin's Work in Connection with These. Pp. xxiv+783+ 10 plates. (Cambridge University Press.) 12s. 6d. net.

Psychology and Industrial Efficiency. By H. Münsterberg. Pp. viii+321. (London: Constable and Co., Ltd.) 6s. net.

DIARY OF SOCIETIES.

THURSDAY, MARCH 6.

ROYAL SOCIETY, at 4.30.-An Automatic Method for the Investigation
of the Velocity of Transmission of Excitation in Mimosa: Prof.
J. C. Bose.-The Evolution of the Cretaceous Asteroidea: W. K.
Spencer.-A Preliminary Note on the Fossil Plants of the Mount Potts
Beds, New Zealand, collected by Mr. D. G. Lillie, Biologist to Capt.
Scott's Antarctic Expedition in the Terra Nova in 1911: Dr. E. A.
Newell Arber.-(1) Trypanosomes found in the Blood of Wild Animals
Living in the Sleeping Sickness Area, Nyasaland; (2) Trypanosome
Diseases of Domestic Animals in Nyasaland-II. Trypanosoma caprae
(Kleine); (3) Morphology of Various Strains of the Trypanosome causing
Disease in Man in Nyasaland. I. The Human Strain: Surg. Gen. Sir D.
Bruce, F.R.S., Majors D. Harvey and A. E. Hamerton, and Lady Bruce.
ROVAL INSTITUTION, at 3.-Surface Energy: W. B. Hardy.
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.-Recent Developments in
the Street Lighting of Manchester: S. L.. Pearce and H. A. Ratcliff.
ROYAL SOCIETY OF ARTS, at 4.30.-Indian Section-The City of Karachi :
J. F. Brunton.

LINNEAN SOCIETY, at 8.- Discussion: The Development and Inheritance of Sexual Characters-Opener: G. Smith.

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ROYAL SOCIETY OF ARTS, at 8.-Coal Gas as a Fuel for Domestic Purposes: F. W. Goodenough.

ROYAL GEOGRAPHICAL SOCIETY, at 8.30.

TUESDAY, MARCH 11.

ROYAL INSTITUTION, at 3.-The Movements of the Stars: Our Greater System Prof. H. H. Turner.

MINERALOGICAL SOCIETY, at 5.30.-The Mineral Collection of Thomas Pennant (1726-1798): W. Campbell Smith. The Minerals and Mineral Localities of Montgomeryshire: Arthur Russell.-A New Stereographic Protractor: Dr. G. F. Herbert Smith.-A (sixth) List of New Mineral Names: L. J. Spencer.

ILLUMINATING ENGINEERING SOCIETY, at 8.-The History of Gas-lighting in this Country: W. J. Liberty.

INSTITUTION OF CIVIL ENGINEERS, at 8.-Notes on City PassengerTransportation in the United States: G. D. Snyder.

WEDNESDAY, MARCH 12.

ROYAL SOCIETY OF ARTS, at 8.-The Use of White Lead in Painting: Noel Heaton.

INSTITUTE OF CHEMISTRY, at 8.-The Function and Scope of "The Chemist" in a Pharmaceutical Works: C. A. Hill.

AFRONAUTICAL SOCIETY, at 8.30.-Some Research: A. P. Thurston. ROVAL METEOROLOGICAL SOCIETY, at 7.30.-British Weather Forecasts: Past and Present: R. G. K Lempfert.

THURSDAY, MARCH 13.

ROYAL SOCIETY, at 4.30.-Probable Papers: A Simple Method of Finding the Approximate Period of Stable Systems: A. Mallock.-The Motion of

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ROYAL INSTITUTION, at 3.—Surface Energy: W. B. Hardy.
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.-Power Supply on the
Rand: A. E. Hadley.

CONCRETE INSTITUTE, at 7.30.-Discussion of Reports of the Reinforced Concrete Practice Standing Committee on: (1) Cracks in Concrete, (2) Surface Treatment of Concrete.

INSTITUTION OF MINING AND METALLURGY, at 8.-Annual General Meeting.

MATHEMATICAL SOCIETY, at 8.-Some Cases of Tidal Motion of Rotating Sheets of Water: J. Proudman.-Indeterminate Equations of the Third and Fourth Degree: L. J. Mordell.

SOCIETY OF DYERS AND COLOURISTS, at 8.-Stripping Agents for Garment Dyers: F. G. Newbury.-A Few Notes on Fur Dyeing: M. C. Lamb. FRIDAY, MARCH 14

ROYAL INSTITUTION, at 9.-Great Advance in Crystallography: Dr. A. E. H. Tutton.

INSTITUTION OF MECHANICAL ENGINEERS, at 8.

PHYSICAL SOCIETY (University College, Gower Street), at 5.-Demonstra-
tion of Spark Photographs: W. B. Haines.-(1) Some Oscillograms of
Condenser Discharges and a Simple Theory of Coupled Circuits; (2) Ex-
hibition of Braun Kathode-Ray Tubes and an Electrostatic Machine for
Working them, used as a High-frequency Oscillograph: Prof. J. A
Fleming. The Stretching and Breaking of Sodium and Potassium: B. E.
Baker. The Latent Heat of Evaporation of Aqueous Salt Solutions:
R. G. Lunnor.-Some Flame Spectra: Dr. E. N. da C. Andrade.
ROYAL ASTRONOMICAL SOCIETY, at 5.

SATURDAY, MARCH 15.
ROYAL INSTITUTION, at 3.-The Properties and Constitution of the Atom
Sir J. J. Thomson, O. M.

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