CXCIV 
NATURE 
[ Oct. 22, 1885 
BEDFORD COLLEGE, LONDON 
(FOR LADIES), 
8 and 9, YORK PLACE, BAKER STREET, W. 
The SESSION began on THURSDAY, October 15. The Course of 
Instruction in Science is arranged to prepare Students for the Preliminary 
Scientific, Intermediate and Full B.Sc. Examinations of the University of 
London. For further particulars apply to the Hon. Sec. at the College. 
B. SHADWELL, Hon. Sec. 
ROYAL AGRICULTURAL SOCIETY OF 
ENGLAND. 
The Appointment of SENIOR ASSISTANT in the Chemical Laboratory 
is now vacant, Salary £150 per Annum. A thorough knowledge of 
Theoretical and Practical Chemistry is requisite. There is also a vacancy 
fora JUNIOR ASSISTANT, Salary commencing at £70 per Annum. 
Applications (inclosing Testimonials) for either of the above to be made by 
letter only to Dr. J. AuGusTus VOELCKER, 12, Hanover Square, W. 
LIGHTNING CONDUCTORS, ELEC- 
TRIC BELLS, ELECTRIC LIGHT, &c.—Messrs. HOWARD and 
HAIG, Electrical Engineers, 97, Leadenhall Street, E.C., are prepared 
to undertake Contracts for the erection of Lightning Conductors and 
Electric Bell Installations; also Temporary Installations of Electric 
Light undertaken, Lightning Conductors Examined, Tested, and 
Repaired. Electrical Repairs done. Annotations for the supply of 
material for Electrical Work. Estimates Free. Special Terms to the | 
rade 
HERMANN HOFFERT, D.Sc. (Medalist, 
London), A.R.S.M., prepares Pupils for the Army, Cooper's Hill, Civil 
Service, B.Sc., &c. Cheerful country residence, good Laboratories. 
Terms moderate.—Apply, Science Schools, South Kensington. 
GENTLEMAN (22) DESIRES A POSI- 
TION as SCIENCE MASTER, and also able to teach Drawing 
and Music. Modest salary only required. Willingly go abroad.— 
Address, “‘ PoLariscore,” care of J. Dry and Co., Wood Street, West- 
minster. 
MATHEMATICS (London and Suburbs).— 
Students attended (at their own homes if they so prefer) by a High 
Wrangler, ‘[rin. Coll., M.A. and F.R.S., on very reasonable terms.— 
X., 9, Dorville Road, Hammersmith, W. 
ONSLOW COLLEGE, 
183, KING'S ROAD, S.W. 
NOW COMMENCING.—Day and Evening Classes in Geology, 
Physics, Chemistry, Physiology, tlectric Engineering, and other subjects, 
LARGE CHEMICAL and METALLURGICAL LABORATORIES 
Fees 5s. to 12s. the Session of 7 months for Evening Work. Apply for 
Prospectus to the PRINCIPAL. 
TO BE SOLD.—A CLARKE’S WINDOW 
Ee but little used.—Apply Box 20, Post 
CABINETS FOR MINERALS, 
FOSSILS, &c. 
6 DRAWERS, 20 INCHES HIGH 21s. 
Io ' “Whe | Lop * 458. 
8 ” 26 ” »” 28s. 
12 ey 39 ” or) 52s. 
NATURALISTS’ GLASS-CAPPED BOXES, ROUND AND 
RECTANGULAR, FROM ONE SHILLING PER DOZEN. 
THOMAS D. RUSSELL, 
78, NEWGATE STREET, E.C. 
MINERALS AND FOSSILS 
SINGLE SPECIMENS OR COLLECTIONS. 
xe. i. BUTLER, 
Assoc. R. Sch. Mines Lond., 
M.A. Oxon, and L.S.A. Lond., 
Successor to the late R. TALLING, 
180, BROMPTON ROAD, 
LONDON, S.wW. 
Five minutes’ walk from the Natural History Museum, S. Kensington. 
LIVING SPECIMENS FOR THE MICROSCOPE 
GOLD MEDALawarded at the FISHERIES EXHIBITION to 
THOMAS BOLTON, s7, NEWHALL STREET, BIRMINGHAM, 
Who has last week sent to his subscribers Melicerta tyro, with drawing 
and description. He has also sent out Lophopus crystallinus, Plumatella 
repens, Melicerta ringens, Stephanoceros Eichornii, Anurza stipitata, Volvox 
globator, Desmids; also Hydra, Ameba, Vorticella, Crayfish, and other 
Specimens for (Huxley and Martin’s) Biological Laboratory work. 
Weekly Announcements will be made inthis place of Organisms T. B. is 
supplying. 
Specimen Tube, One Shilling, post free. 
Twenty-six Tubesin course of Six Months for Subscription of £1 15 
or Twelve Tubes for 10s. 6d. 
Portfolio of Drawings, Eleven Parts, 1s. each. 
EDWARD WARD has pleasure in an- 
nouncing the issue of a new Micro-Slide of Zoophyée, with tentacle- 
out, in the special manner so well known to his numerous patrons. 
isseneze 
Plumulariasimilis... (post-free) 2 8 
Also, quite new :-— 
Gorgonia verrucosa (polypestained) ,, 22 
Podalirustypicus (Spectre Shrimp) _,, me 
EDWARD WARD, 249, OXFORD STREET, MANCHESTER. 
CHEMICAL APPARATUS, Wholesale, 
Retail, for Colleges, Schools, and Chemical Works. New Catalogue of 
90 pages and 500 clear Illustrations, post free, 2¢.—WILLIAM 
HUME, 1, Lothian Street, Edinburgh. 
BOOKS (Secondhand), Miscellaneous, Re. 
mainders, &.—C. HERBERT, English and Foreign Bookseller, 319. 
Goswell Road, London, E.C. Catalogue free onreceipt of two stamps, 
Libraries, Old Books,and Parchment purchased. 
MICROSCOPISTS, 
ASTRONOMERS, 
SURGEON DENTISTS. 
[503 
To 
THE SWAN LAMP 
AND FITTINGS may be purchased at 
MAWSON AND SWAN'S STORE, 
31, °FARRINGDON STREET, E.C., & MOSLEY STREET 
NEWCAS ULE-ON-TYNE. 
SIX PRIZE MEDALS 
AWARDED FOR GEOLOGICAL COLLECTIONS 
Geological Collections especially adapted for Teaching as supplied to Science 
and Art Department, and used by all Lecturers and Teachers in 
Great Britain, &c-. 
New and Rare Minerals constantly arriving from all parts for selection «f 
Single Specimens. 
ROCK SECTIONS AND ROCK SPECIMENS: 
The Largest Variety in England. 
New Catalogues and Lists onapplication to— 
JAMES R. GREGORY, 
88, CHARLOTTE STREET, FITZROY SQUARE, LONDON. 
Established 27 Years in London. 
With numerous []lustrations. Crown 8vo, 3s. 6d. 
POLARISATION OF LIGHT.’ By W 
SPOTTISWQODE, LL.D.,late President of the Royal Society, &c. 
New Edition [Nature Sertes. 
MACMILLAN & CO., LONDON. 
