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THE VERY LATEST

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A Simple,

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SOLE

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66

'N'

JUST PUBLISHED.

RAYS:

A Collection of Papers communicated to the Academy of Sciences. With additional Notes and Instructions for the Construction of Phosphorescent Screens.

By R. BLONDLOT,

Correspondent of the Institute of France, Professor in the University of Nancy.

Translated by J. GARCIN, Ingénieur E.S.E. Licencié-ès-Sciences.

With Phosphorescent Screen and other Illustrations. Crown 8vo. 3s. 6d. net.

JUST PUBLISHED.

OF ELECTRO-CHEMISTRY.

PRACTICAL METHODS OF

By F. MOLLWO PERKIN, Ph.D.,

Head of Chemistry Department, Borough Polytechnic, London. 8vo. 6s. net.

REVISED EDITION, 1903.

ELECTRICAL

ENGINEERING:

FOR ELECTRIC LIGHT ARTISANS AND STUDENTS. (Embracing those Branches prescribed in the Syllabus issued by the City and Guilds Technical Institute.) By W. SLINGO and R. BROOKER.

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ELEMENTARY TREATISE ON ELECTRICITY & MAGNETISM.

By G. CAREY FOSTER, F.R.S., Fellow and Emeritus Professor of Physics in University College, London; and ALFRED W. PORTER, B.Sc., Fellow and Assistant Professor of Physics in University College, London. Founded on Joubert's "Traité Elémentaire d'Electricité." With 374 Illustrations and Diagrams. 8vo. 10s. 6d. net. THIRD ENGLISH EDITION. JUST PUBLISHED.

THE PRINCIPLES OF CHEMISTRY.

By D. MENDELÉEFF.

Translated from the Russian (Seventh Edition) by GEORGE KAMENSKY, A.R.S.M., of the Imperial Mint, St. Petersburg, and Edited by THOMAS H. POPE, B.Sc., F.I.C. With 110 Diagrams and Illustrations. 2 Vols. 8vo. 82s. net. Complete in THREE VOLUMES, Half-Bound.

Vol. I., with 236 Illustrations, 8vo, £2 2s. Vol. II., with 240 Illustrations, 8vo, £2 2s.
Vol III., with 352 Illustrations, 8vo, £3 3s.

A DICTIONARY OF APPLIED CHEMISTRY.

By T. E. THORPE, C.B., F.R.S., Ph.D., D.Sc., &c.,
ASSISTED BY EMINENT CONTRIBUTORS.

By Professor GANOT.

TRANSLATED AND EDITED BY E. ATKINSON, Ph.D., F.C.S.,
AND PROFESSOR A. W. KEINOLD, M.A., F.R.S
ELEMENTARY TREATISE ON PHYSICS, EX-
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REINOLD, M.A., F.R.S., Professor of Physics in the Royal Naval
College, Greenwich. With 9 Coloured Plates and Maps and 1048
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NATURAL PHILOSOPHY FOR GENERAL
READERS AND YOUNG PERSONS. Revised by A. W.
REINOLD, M.A., F.R.S With 7 Plates, 632 Woodcuts, and an
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75. 6d.

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PRINCIPAL SIR WILLIAM TURNER AND PROFESSORS D. J. CUNNINGHAM, G. S. HUNTINGTON, A. MACALISTER, and J. G. M'KENDRICK. Vol. XXXIX. New Series-Vol. XIX. Part III.-April, 1905. CONTENTS.

Arthur Keith, M.D. The Nature of the Mammalian Diaphragm and Pleural Cavities.

Anderson M'Kendrick, M.B. Dissociation in Certain Vital Phenomena. Alfred H. Young, M. B. Observations on the Lumbar Arteries.

R. B. Seymour Sewell, B.A. The Small Thyro-Arytenoideus Muscle. Peter Thompson, M.D., and W. T. Hillier, M. R.C.S. Myology of the Hind Limb of the Marsupial Mole.

John Cameron, M. D. The Development of Retina.

Albert A. Gray, M.D. Notes upon the Membranous Labyrinth.
Professor Ambrose Birmingham.

Professor George Bond Howes, F.R.S.

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V.-Mathematics, Second Stage. Being the Additional Algebra and Euclid with the Trigonometry required. Edited by Dr. WM. BRIGGS, M.A., F.R.A.S. 35. 6d. VIA.-Mechanics, Second Stage, or Advanced. By Dr. WM. BRIGGS, M.A., F.R.A.S., and G. H. BRYAN, Sc. D., M.A., F.R.S. Vol. I. DYNAMICS. 35. 6d. VIA.-Mechanics, Second Stage, or Advanced. By Dr. WM. BRIGGS, M.A., F.R.A.S., and G. H. BRYAN, Sc. D., M.A., F.R.S. Vol. II. STATICS. 38. 6d. VIIIC.-Heat, Second Stage, or Advanced. By R. WALLACE STEWART, D.Sc. Lond. 35. IX.-Magnetism and Electricity, Second Stage, or Advanced. By R. W. STEWART, D.Sc. Lond. 35. 6d. X.-Inorganic Chemistry (Theoretical), Second Stage, or Advanced. By G. H, BAILEY, D.Sc. by Dr. WM. BRIGGS, M.A., F.C.S. 3s. 6d.

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XXV.-Hygiene, Second Stage, or Advanced. By A. E. IKIN, M.B., and R. A. LYSTER, B.Sc. 3s. 6d.

PRESS WAREHOUSE, 157 DRURY LANE, W.C.
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The Journal of Agricultural Science.
Edited by R. H. BIFFEN, M. A., A. D. HALL, M.A.,
T. H. MIDDLETON, M.A., and T. B. WOOD, M.A., in
consultation with W. BATESON, M.A., F.R.S., J. R. CAMP-
BELL, B.Sc., and W. SOMERVILLE, M. A., D.Sc.
Now Ready. Vol. I., Part I. January, 1905.
Contents:-

Editorial.

1. Biffen, R. H.-Mendel's Laws of Inheritance and Wheat Breeding (Plate I.)

2. Howard, Albert.-The Influence of Pollination on the Development of the Hop. (One figure in text and Plate II.)

3.

Golding, John.-The Importance of the Removal of the Products of
Growth in the Assimilation of Nitrogen by the Organisins of the
Root Nodules of Leguminous Plants.

4. Hall, A. D.-The Analysis of the Soil by Means of the Plant.

5. Collins, S. Hoare.-Variation in the Chemical Composition of the Swede.

6. Dyer, Bernard.-Town Stable Manure: its Chemical Composition and the Changes it Undergoes on Keeping.

7. Wood, T. B., and Berry, R. A.-Soil Analysis as a Guide to the
Manurial Treatment of Poor Pastures.

8. Middleton, T. H.-The Improvement of Poor Pastures.
NOTE Calcium Cyanamide.

The Journal of Agricultural Science will be issued as material accumu lates, aiming at quarterly parts of about 100 pages, with plates and figures, four parts to constitute a volume.

The Subscription price, payable in advance, is 15s. per volume (post free); single numbers, 55. net. A prospectus will be sent on application. London: CAMBRIDGE UNIVERSITY PRESS WAREHOUSE, Ave Maria Lane, C. F. CLAY, Manager.

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A List of this Series of Steel and of Photogravure Portraits of Men Science will be sent post free to any reader of "Nature" on application to the Publishers.

ST. MARTIN'S STREET, LONDON, W.C.

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Including dense flint glass prism, with micrometer movement, reading to 1 minute. Universally acknowledged to be the most
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Also, smaller size, Price £6 nett, including two prisms, one being a hollow prism. As supplied to the Royal College of Science,
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report to the Egyptian Council of Ministers. It appears that the theory of stresses upon masonry dams requires important modifications, which will have to be taken into consideration in all future designs for such works. We understand that much experimental work on the subject is at present in progress, and that results of great interest to hydraulic engineers may be expected.

THE anniversary dinner of the Chemical Society was held at the Whitehall Rooms, Hôtel Métropole, on March 29, when the president, Prof. W. A. Tilden, was in the chair, and many leading representatives of the physical sciences were present. Sir William Church, in giving the toast of Prosperity to the Chemical Society," spoke of the advances which chemical science has made, and declared that the advantages which have accrued to the United Kingdom, as a result of the work of chemists, cannot be over-estimated. Prof. Meldola submitted the toast of Scientific Institutions," which was responded to by Prof. J. Larmor and Dr. R. T. Glazebrook. Sir William Ramsay proposed the toast of "The Guests," and in replying Mr. Haldane said that as science never stood still, but progressed continually, so the Government of this country must, if the nation is to hold its own, make an increasing use of science in all departments of the State service. He expressed the belief that in the course of the next few years the position of science in the Government of the country will be much more prominent, and that scientific methods will become much more general. Prof. Perry also spoke.

A MEETING of the Institution of Naval Architects will be held at the Society of Arts, John Street, Adelphi, on April 12-14. Lord Glasgow, president of the institution, who will occupy the chair, will deliver his address on April 12; and Mr. W. E. Smith, C.B., Colonel N. Soliani, and Mr. Herbert Rowell will submit papers for discussion. On April 13 Prof. J. H. Biles will read a paper on the strength of ships, with special reference to experiments and calculations made upon His Majesty's ship Wolf, and other papers will be submitted by Mr. F. H. Alexander, Mr. J. Bruhn, Mr. R. E. Froude, Mr. C. E. Stromeyer, Mr. A. W. Johns, and Herr S. Popper. Among the papers to be read on April 14 is one on the Admiralty course of study for the training of naval architects by Mr. E. L. Attwood, and another on submarine signalling by means of sound by Mr. J. B. Millet, of Boston, U.S.A.

THE Royal medals of the Royal Geographical Society for this year have been awarded to Sir Martin Conway (founder's medal) for his explorations of various mountain regions of the world, and his work among the islands of Spitsbergen; and to Captain C. H. D. Ryder, R.E. (patron's medal), for the important and extensive work which he accomplished while acting as principal survey officer on the recent Tibet Mission. The Victoria research medal, for distinguished service to the cause of geographical research, as distinguished from exploration, has been awarded to Mr. J. G. Bartholomew. The Murchison grant goes to Mr. William Wallace, C.M.G., Deputy High Commissioner of the Northern Nigerian Protectorate. Colonel F. R. Maunsell, R.A., has been awarded the Gill memorial for his explorations during many years' residence in Asia Minor; Mr. F. J. Lewis the Cuthbert Peek grant for contributions to the knowledge of botanical distribution by his researches into the geographical distribution of vegetation in the north of England; and Captain Philip Maud, R.E., the Back grant for survey work in 1903 along the southern border of Abyssinia.

THE concluding issue of the Proceedings of the Philadelphia Academy for 1904 contains the reports of the secretaries and curators for that year, from which it appears that the society continues to be in a flourishing condition, both as regards its publications and its museum.

In an article published in Naturen for March, Mr. J. Rekstad shows the value of photography to illustrate the secular variation in glacier terminations, the respective differences between two glaciers in August, 1899, and September, 1903, being admirably exhibited. In both instances, it may be remarked, there has been very decided shrinkage in the length of the glacier. The value of photographs of this nature as a basis of comparison in the years to come will be very great.

WE have been favoured with a copy of No. 17 of the Boletin of the Institute of Mining Engineers of Peru, which contains an account of certain annelid remains and ammonites in the Salto del Fraile and Morro Solar districts by Mr. C. I. Lisson. Both formations appear to be of Neocomian age, the higher beds of Salto del Fraile being remarkable for the number of borings of annelids of the genus Tigillites they contain, while the lower Morro Solar stratum is noteworthy for its ammonites of the group Sonneratia.

IN the Report and Transactions of the East Kent Scientific and Natural History Society for the past year, the secretary takes occasion to direct attention to the general apathy towards matters scientific prevailing in that portion of the county he represents. Owing to this cause, the season's excursions were practically a failure, and there may be some connection between this apathy and the fact that it has hitherto been found impracticable properly to arrange and display the natural history collections in the Royal Museum.

THE Zoologist for March opens with an article by Mr. Lydekker on the small Asiatic mountain antelopes known as gorals. The main object of the article was to describe the Burmese species; but in the course of his investigation the author was led to believe in the existence of two Himalayan representatives of this group, one of which he names Urotragus bedfordi, on account of the type specimen having lived in the park at Woburn. In the penultimate line on p. 84 we notice that the word eastern should be western. The second article, by Mr. John Gurney, is devoted to Norfolk bird-life in 1904, and it is interesting to note that in the spring of that year the author had the good fortune to see two avocets and seven spoonbills on Breydon Broad.

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