WATKINS & DONCASTER,

Naturalists and Manufacturers of CABINETS AND APPARATUS

FOR ENTOMOLOGY, BIRDS EGGS AND SKINS. AND ALL
BRANCHES OF NATURAL HISTORY.

SPECIAL SHOW-ROOM FOR CABINETS.
N.B. For Excellence and Superiority of Cabinets and Apparatus, refei
ences are permitted to distinguished patrons, Museums, Colleges, &c.
A LARGE STOCK OF Insects, birds' EuGS AND SKINS.
SPECIALITY.-Objects for Nature Study, Drawing
Classes, &c.

Birds, Mammals, &c., Preserved and Mounted by First-class Workmen true to Nature.

All Books and Publications on Natural History supplied.

36 STRAND, LONDON, W.C.

(Five Doors from Charing Cross.) CATALOGUE (102 pp.) POST FREE.

MINERALS.

Some Recent Additions to Stock.

From Cornwall: BOURNONITE, TETRAHEDRITE, PHARMACOSIDERITE,
SCORODITE, &c.

From Japan: FINE TOPAZ and ORTHOCLASE CRYSTALS.
Specimens sent for Selection.

Cabinets, Geologists' Hammers and Chisels, Glass-Capped
Boxes, Card Trays, Wood and Glass Models of Crystals, and
ail Requisite Apparatus for Geologists and Mineralogists.
NEW CATALOGUES POST FREE.

THOMAS D. RUSSELL, 78 Newgate Street, London, E.C.

NOTICE OF REMOVAL. JAMES R. GREGORY & Co.,

MINERALOGISTS, &c.,

of KELSO PLACE, KENSINGTON,

beg to announce that they have removed to more convenient and commodious Premises at

139 FULHAM ROAD, SOUTH KENSINGTON, S.W.

BOTANICAL MICROSCOPIC SLIDES FOR STUDENTS.

Including Four Series, 50 Slides in each. Price £1 18. per Series; adapted for Board of Education and London University Examinations, Idustrating Mitosis, Leucoplasts, Thyloses, Root, Stem, and Flower Develop. ment, Anomalous Stems, Embryo-sac Structure, Pollen Tubes, Botrydium, Edogonium, Coleochaete, Chara, Sexual Organs and Cystocarps in the Rhodophyceae; Peronospora, Saccharomyces, Claviceps, Puccinia, Anthoceros, Pilularia, Marsilea, Isoetes, Psilotum, Selaginella, Pinus, &c.

SAVAGE CURIOSITIES.

ETHNOGRAPHICAL SPECIMENS.

Stock of over 10,000 Specimens of Weapons, Implements, Ornaments, Dress, Idols, Musical Instruments, &c., &c., used by all the Races of Mankind, for sale at very low prices. All objects guaranteed genuine. Trophies of genuine old Arms made for Billiard Rooms, Halls, &c., prices from 255.; also mounted Horns.- Catalogue of Ethnographical Specimens illustrated with Bromide Photographs, 4d. monthly, 35. 6d. yearly. Collections Arranged and Catalogued. Specimens bought. W. O. OLDMAN, 77 BRIXTON HILL, LONDON, S. W.

Minerals, Rocks, Fossils, Metallic Ores, Rough Precious Stones, &c.

A Large Assortment from all parts of the world always on view, and at all prices. Inspection invited.

Crude Mineral for Chemistry Students and Technical Schools. Single Crystals and Teaching Specimens in Great Variety. RICHARDS' SHOW ROOMS,

3 Beauchamp Place, Brompton Road, South Kensington, London, S.W.

LIVING SPECIMENS FOR

THE MICROSCOPE.

Volvox, Spirogyra, Desmids, Diatoms, Amoeba, Arcella, Actinost bærium, Vorticella, Stentor, Hydra, Floscularia, Stephanoceros, Melicerta, and many other specimens of Pond Life. Price 18. per Tube, Post Free. Helix pomatia, Astacus, Amphioxus, Rana, Anodon, &c., for Dissection purposes.

THOMAS BOLTON,

25 BALSALL HEATH ROAD, BIRMINGHAM.

MARINE BIOLOGICAL ASSOCIATION
OF THE UNITED KINGDOM.
THE LABORATORY, PLYMOUTH.
The following animals can always be supplied, either living
or preserved by the best methods :-

Sycon; Clava, Obelia, Sertularia; Actinia, Tealia, Caryophyllia, Alcy.
onium; Hormiphora (preserved); Leptoplana; Lineus, Amphiporus,
Nereis, Aphrodite, Arenicola, Lanice, Terebella; Lepas, Balanus,
Gammarus, Ligia Mysis, Nebalia, Carcinus; Patella, Buccinum, Eledone,
Pectens Bugula, Crisia, Pedicellina, Holothuria, Asterias, Echinus,
Ascidia, Salpa (preserved), Scyllium, Raia, &c., &c.
For prices and more detailed lists apply to
Biological Laboratory, Plymouth.

THE DIRECTOR.

SUBSCRIPTIONS TO "NATURE."

66

of NATURE is 'PHUSIS," LONDON.

CHARGES FOR ADVERTISEMENTS. £ s. d.'

*Three Lines in Column. Per Line after.

0 15 6

O 8 O

Column

£ s. d.

2

6

O 0 9

o 18 6

Quarter Page, or Half a Column 1 15 Half a Page, or a Column 3 5 Whole Page 66 Q

One Sixteenth Page, or Eighth Col. 1o o One Eighth Page, or Quarter

SOUTH-WESTERN POLYTECHNIC,

MANRESA ROAD, CHELSEA, S.W. EVENING CLASSES commence SEPTEMBER 24. DAY COLLEGE COURSES commence OCTOBER 1. The Day College Courses consist of 30 hours per week, and are in preparation for London University degrees of B.Sc. in Mechanical and Electrical Engineering, in Chemistry, Physics, and Natural Science. The composition fee for the Session of 3 terms is £15.

The Evening Classes consist of similar courses at much reduced rates. The Technical Day Courses are arranged to extend over 3 years and prepare for Engineering, Electrical, Chemical, and Metallurgical professions. (*W. H. ECCLES, D.Sc. *J. LISTER, A.R.C.S.

Mathematics

Physics...

Chemistry

S. SKINNER, M.A.

*W. H. ECCLES, D.Sc.

*L. LOWNDS, B.Sc., Ph. D. (*J. B. COLEMAN, A.R.C.S. *J. C. CROCKER, M.A.

*F. H. LowE, B.Sc.

C. W. HALE.

W. E. OAKDEN.

(*H. B. LACEY.

T. G. HILL, A.R.C.S.

*A. J. MASLEN, F. L.S.

*H. B. FANTHAM, B.Sc., A. R.C.S.

W. W. F. PULLEN, A.M.I.C.E.,
M.I.M.E., Wb.Sc.

*A. MACKLOW SMITH.

H. AUGHTIE.

A. J. MAKOWɛr, B.A.

U. A. OSCHWALD, B.A. *B. H. MORPHY.

MANRESA ROAD, CHELSEA, S. W. EVENING CLASSES commence SEPTEMBER 24. DAY COLLEGE COURSES commence OCTOBER 1. DEPARTMENT OF CHEMISTRY AND METALLURGY. HEAD OF DEPARTMENT: J. B. COLEMAN, A.R.C.S., F.I.C. PHYSICAL CHEMISTRY.-A Course of about 36 Experimental Lectures on this subject, suitable for University Students, will be given by Mr. J. C. CROCKER, M.A. Suitable practical work will be taken on the same day.

SYLLABUS :-Determination of Molecular Weights. Constitution and Physical Properties. Solution. Alloys. Solubility. Association and Dissociation. Electro-chemistry. Thermo-chemistry. Chemical Equilibrium. Velocity of Reaction. Day Course. Fridays, Lecture 2-3; Practical 3-5. Fee, 215. per Term. Evening,, Fridays, Lecture 7-8: Practical 8-10. Fee, 10s. per Session. METALLURGY.-Elementary and Advanced Courses on Metallurgy are given at the times stated below by Mr. W. E. OAKDEN, F.C.S. The Metallurgical Laboratory has been fully equipped and provided with the latest apparatus for experimental work in Metallography, Pyrometry, and Electrical-furnace work. Students may now carry out the work for the B.Sc. Degree in the Faculty of Engineering (Metallurgy).

Day Courses. Elementary, Fridays, Lecture 2-3; Practical 3-5. Fee 215. per Term.

Advanced, Wednesdays, Lecture 4-5; Practical 2-4. Fee, 215. per

Term.

Evening Courses. Elementary, Fridays, Lecture 7.30-8.30; Practical 8.30-10.0. Fee, 10s. per Session.

Advanced, Wednesdays, Lecture 7.30-8.30; Practical 8.30-10.0. Fee, 105. per Session.

Day Laboratory Work can be taken at other times by arrangement.

SIDNEY SKINNER, M.A., Principal.

LONDON MATRICULATION.

MORNING, AFTERNOON, AND EVENING CLASSES

FOR THE

MATRICULATION, PRELIM. SCI. (M.B.), INTER. ARTS AND SCIENCE, B.A. AND B.Sc. EXAMINATIONS OF LONDON UNIVERSITY ARE HELD AT

UNIVERSITY TUTORIAL COLLEGE.

Annually for the last Seven Years, about 300 Students of University Tutorial College have passed London University Examinations.

Prospectus may be had post free from the VICE-PRINCIPAL, University Tutorial College, 32 Red Lion Square, Holborn,

BOROUGH POLYTECHNIC INSTITUTE (Five minutes from Blackfriars, Waterloo and Westminster Bridges),

103 BOROUGH ROAD, S.E.

EVENING CLASSES (LECTURES AND PRACTICAL LABORAT RY WORK), Commencing MONDAY, SEPTEMBER 24, 1906. CHEMISTRY.-F. MOLLWO PERKIN, Ph.D., assisted by H. D. Law, B.Sc. INORGANIC.-Stages I.. II., and III. Fees, 10s. to 155. ORGANIC.-Stages I., II., and III. Fees, ros. to 208. ELECTRO-CHEMISTRY.-Lectures on FRIDAY evenings. Practical work is taken during the day. Fee, for Lecture only, 51.; Day Practical Work (three days per week), 60s.

The

SATURDAY MORNING CLASS in PRACTICAL CHEMISTRY, from 9.30 to 1. Fee, 10s.

RESEARCH.-Special facilities are given for those desirous of engaging in Research work, either in Electro-chemistry, Organic or Inorganic Chemistry.

DAY Course in Technological Chemistry, including Engineering, October to July. £10.

KING'S College.
(UNIVERSITY OF LONDON.)

EVENING CLASS DEPARTMENT.

Courses are arranged for the Intermediate and Final Examinations for the B.A. and B.Sc. degrees of the University of London. Students taking the full course pay composition fees and rank as Internal Students of the University. There are also classes in Architectural and Engineering subjects.

For full information and prospectus apply to the Dean (Mr. R.WK

New Session begins Wednesday, September 26.

BIRKBECK COLLEGE,

BREAMS BUILDINGS, CHANCERY LANE, E.C. FACULTY OF SCIENCE.

DAY AND EVENING COURSES, under Recognised Teachers of the University of London.

Chemistry

Physics...

Mathematics

Botany

Zoology..

UNIVERSITY COLLEGE OF NORTH

WALES (BANGOR).

SESSION 1906-7 will open on OCTOBER 2.

DEPARTMENTS of MATHEMATICS, PHYSICS, CHEMISTRY,

MATHEMATICS

PHYSICS

CHEMISTRY...

C. V. COATES, M.A.

H. W. UNTHANK, B.A., B.Sc.

J. W. EVANS, D.Sc.

BIOLOGY

Geology & Mineralogy
Assaying, Metallurgy Mining. GEO. PATCHIN, A.R.S.M
RESEARCH in Chemistry and Physics in well-equipped laboratories.
French, German, Spanish, and Italian Classes.
EVENING CLASSES in Biology, Physiology, Practical Geometry,
Building and Machine Construction, Theoretical Mechanics, Applied
Mechanics and Mechanism, Land and Quantity Surveying.

Calendar 3d. (post free 5d.), on application to the SECRETARY. BEDFORD COLLEGE FOR WOMEN. (UNIVERSITY OF LONDON.)

YORK PLACE, BAKER STREET, LONDON, W. The SESSION 1906-7 will open on THURSDAY, OCTOBER 4. Students are requested to enter their names on Wednesday, October 3. Lectures are given in all branches of General and Higher Education. Taken systematically, they form a connected and progressive course, but a single course in any subject may be attended.

Courses are held in preparation for all Examinations of the University of London in Arts and Science, for the Teacher's Diploma (London), and for the Teacher's Certificate (Cambridge), and also a Special Course of Scientific Instruction in Hygiene.

Six Laboratories are open to Students for Practical work.

Three Entrance Scholarships, one in Arts and two in Science, will be offered for competition in June, 1907.

The Early English Text Society's Prize will be awarded in June, 1907. Students can reside in the College.

TRAINING DEPARTMENT FOR SECONDARY TEACHERS. Three Scholarships, each of the value of £20 for one year, are offered for the Course of Secondary Training, beginning in January, 1907.

The Scholarships will be awarded to the best candidate holding a degree or equivalent in Arts or Science.

Applications should reach the HEAD OF THE TRAINING DEPARTMENT not later than December 15.

WESTMINSTER HOSPITAL.

(UNIVERSITY OF LONDON.)

BROAD SANCTUARY, S.W.

The WINTER SESSION of the Medical School will commence on OCTOBER 1.

The Hospital is most conveniently situated, being immediately opposite Westminster Abbey.

ENTRANCE SCHOLARSHIPS to the value of £320 will be competed for on September 24 to 26.

FEES. For the London University curriculum, 140 guineas. For the curriculum of the Conjoint Examining Board, 120 guineas.

The Hospital is fully equipped with every modern requirement, including a recently built clinical laboratory.

There are unrivalled opportunities for CLINICAL WORK, and great facilities for obtaining RESIDENT APPOINTMENTS, the Resident Medical Officers being appointed by competitive examination.

Under a scheme for the teaching of the Preliminary and Intermediate subjects of the medical course recently made with the Science department of King's College, all the subjects of the curriculum in its Preliminary, Intermediate, and Final branches are now taught by specialists in their own department.

A prospectus and full particulars may be obtained by application to
E. PERCY PATON, M.S., F.R.C.S.,
Dean of the School.

ENGINEERING AND TECHNICAL OPTICS. NORTHAMPTON INSTITUTE, CLERKENWELL, LONDON, E.C.

Full particulars as to fees, dates, &c., and all information respecting the work of the Institute, can be obtained at the Institute or on appli cation to R. MULLINEUX WALMSLEY, D.Sc.,

Assistant Lecturer and Demonstrator, J.
LLOYD WILLIAMS.

Zoology and Physiology-Prof. PHILIP J. WHITE,
M.B., F.R.S.E.

The Classes and Laboratory Courses of this College are arranged to suit the requirements of Students of Practical Science, as well as of Students preparing for University and other Examinations. The Lectures in Chem. istry, Physics, Botany, and Zoology are recognised for the first year of medical study.

The extensive Laboratories (Physical, Chemical, and Biological) are fully equipped for Study and Research.

Inclusive Tuition Fee, £11 15. Laboratory Fees (per Term) on the scale of £1 15. for six hours a week, in each Department.

A considerable number of Scholarships and Exhibitions are open for com. petition at the beginning of each Session, and several are awarded at the close of each Session on the result of the year's work.

For full information as to Courses, apply for Prospectus to the Secretary and Registrar, J. E. LLOYD, M.A.

University College has been constituted a University Centre for the teaching of the Medical Sciences.

Courses of instruction are arranged for the Preliminary Scientific and the Intermediate Examination in Medicine of the University, as well as for the corresponding examinations of the Examining Board of the Royal Colleges of Physicians and Surgeons and other Licensing Bodies.

Fees for the Preliminary Scientific Course, 25 guineas; and for the Intermediate Course, 55 guineas.

The Examination for the Bucknill Scholarship of the value of 135 guineas, and for the Entrance Exhibitions, of the value of 55 guineas each, com. mences on September 25.

For Prospectus and other information apply to the SECRETARY, University College, London (Gower Street, W.C.).

W. W. SETON, M.A., Secretary.

CITY OF LONDON COLLEGE.

ACTING IN CONJUNCTION WITH THE LONDON CHAMBER OF COMMERCE. WHITE ST., and ROPEMAKER St., Moorfields, E.C. (Near Moorgate and Liverpool Street Stations.) PRINCIPAL: SIDNEY HUMPHRIES, B.A., LL.B. (Cantab.) Michaelmas Term begins Monday, October 1st. EVENING CLASSES in ALL BRANCHES of SCIENCE. Well-equipped LABORATORIES for Practical Work in CHEMISTRY, BIOLOGY, BOTANY, GEOLOGY, and all branches of PHYSICS.

Special Courses for London University Matric., Inter., and Final B.A., B.Sc., Conjoint Board, Pharmaceutical and other examinations. Classes are also held in all Commercial Subjects, in Languages, Literature and Art. All Classes are open to both sexes.

SATURDAY COURSES for Matric., Inter., and Final B.A., B.Sc.
DAY COMMERCIAL and HIGHER COMMERCIAL SCHOOLS.
and all other information, gratis on application.
Prospectuses,
DAVID SAVAGE, Secretary.

For other Scholastic Advertisements, see page clxxxii, and