CXXll 



NATURE 



\_Feb. 20, 1879 



MICROSCOPIC OBJECTS 



Gt (UperlatiTe perfection, illustrating Histology and every branch of Micro- 

 scopy. Catalogue post free and gratis on application. 



PARIS UNIVERSAL EXHIBITION, 1878. 



Prize Medal awarded for Excellence^ Variety, &^c, 

 EDMUND WHEELER. 48N, Tollington Road. HoUoway. London, N. 



ROYAL AGRICULTURAL SOCIETY OF 

 ENGLAND. 



AGRICULTURAL EDUCATION. 



The Examination of Candidates for the Society's Prize and Certificates, 

 including the Life Membership of the Society, will take place in the week 

 commencing TUESDAY, April 8th, 1879. 



Copies of the Form of Entry, which is required to be sent in by April 1st, 

 1879, may be had on application to 



H. M. JENKINS, Secretary. 



12, Hanover Square, London, W. 



SUNDAY LECTURE SOCIETY.— LEC- 



TURES at ST. GEORGE'S HALL, Langham Place, each SUNDAY 

 AFTERNOON, commencing at Four o'clock precisely. Sunday, 

 February 23. — Sir Arthur Hobhouse, K.C.S.L, on "The English 

 Rule in India." — Members' Annual Subscription, £1. Payment at 

 the Door — One Penny, Sixpence, and (reserved seats) One Shilling. 



LE NEVE FOSTER TESTIMONIAL. 



The Committee of this Fund have to announce that the Subscription List 

 will shortly be closed, and they will therefore feel obliged if intending sub- 

 scribers, who have not yet sent in their names, will forward their donations 

 to the Hon. Treasurers, Lord Alfred S. Churchill or Mr. William Hawes, 

 at the Office of the Society of Arts, John Street, Adelphi, W.C. 



Cheques should be made payable to the "Foster Testimonial" and 

 crossed " Robarts, Lubbock, and Co.," or "Cox, Biddulph, and Co." 



DUNHEVED COLLEGE (LIMITED), 



LAUNCESTON, CORNWALL. 

 Seven hours from London. Skparatk Bedrooms. Systematic Teaching 

 in SciKNCH, Foreign Languages, and University Courses. 

 Calendar post free from 



The Principal— BENJAMIN RALPH, LL.B. Dub. 



ROYAL POLYTECHNIC— CLASSES for 



the preparation of Students for University Examinations, under the 

 direction of EDWARD B. AVELING, D.Sc, F.L.S. London Uni- 

 versity Matriculation, ist and and B.Sc, Preliminary Scientific M. B., 

 Botany, Physiology, Chemistry. All the work practical. 



BERNERS COLLEGE.— The Laboratory 



and Class Rooms are open for Private and Class Study, morning and 

 evening. ANALYSES performed. Especial arrangements for Gentle- 

 men and Ladies preparing for the various Examining Boards. Fees 

 moderate. — Apply to Prof Gardner, at Bemers College, 44, Bemers 

 Street, W. 



THIN GLASS FOR MICROSCOPIC 



MOUNTING, of best quality. Orcles, 31. 6d. per ounce ; Squares, 

 2J. gd. ; post free 2d. extra ; Ground-edged Slip>s, 5s. per gross ; alio 

 other Mounting Materials and Objects prepared for mounting.— CHAS. 

 PETIT, 151, High Street, Stoke Newington. N. 



LIBRARY OF HARVARD UNIVERSITY, 

 CAMBRIDGE, MASS., U.S.A. 



Packages for the General Library, or for any of the Departmental 

 Libraries (Astronomical Observatory, Botanic Garden, Bussey Institution, 

 Divinity School, Law School, Museum of Comparative Zoology, Scientific 

 School), may be sent to the Agents, Messrs. TrCbner & Co., 57 and 59, 

 LudgateHill, London. 

 JUSTIN WINSOR, Librariy. 



^VITHERNDEN SCHOOL, CATERHAM 



VALLEY, SURREY.— Principal, Mr. C. H. LAKE, B.A. Lond. (in 

 Honours). Education on Natural Principles. A limited number of Pupils. 



AQUARIA, Salt and Fresh-water, for Sale. 



—Salt-water, with plate-glass front and rest slate, dark chamber, 44 

 inches long, 15I inches high, 21 inches [Wide. Fresh-water, with plate- 

 glass front and back, the rest slate, 42 inches long, 16 inches high, 21^ 

 inches wide. Separate ornamental wooden stands. Price for the two, 

 ;ti8,'or will be sold separately. — Address F., Lord's Lane, Hcddesdon, 

 Herts. 



TO INVENTORS and OTHERS.— The 



Directors of the ROYAL POLYTECHNIC are prepared to exhibit 

 and explain all Inventions and Discoveries of public interest. — For 

 particulars apply to the Secretary of the Institution. 



TUITION for the UNIVERSITIES and 



ARMY. — Non-resident Pupils received for Individual Instruction by a 

 Private Tutor. — Address Tutor, 8, Gloucester Terrace, Onslow Gardens, 

 S.W. 



LIVING SPECIMENS FOR THE MICROSCOPE. 



THOMAS BOLTON, MICROSCOPIST'S and NATURALIST'S 

 STUDIO, 17, ANN STREET, BIRMINGHAM. 



T. B. has last week posted to his subscribers Embryo Trout in the 

 alevin stage, with diagrammatic sketch. He has also sent out Polyioa, 

 Sponge, Stephanoceros, Oicistes, Philodina, Hydatina, Rhinops, Nitella 

 in fructification, Desmids, &c. 



Weekly announcements will be made in this place of organisms T. B. 

 is supplying. 



Price List of Specimens on application, with Stamped Addressed 

 Envelope. 



TELESCOPE for SALE.— A lo-feet Refrac- 



tor.' 6-inch objective, massive iron equatorial stand, clock, number 'o£ 

 eye-pieces, fittings of an observatory complete, with splendidly made 

 dome, sliding shutter, &c., 13 feet in diameter, will be sold at one- 

 third its original cost. — Apply J. Titterton, Ely, Cambs. 



TELESCOPE for SALE.— A Fine Instru- i 



ment, 3j Objective, on Parallactic Stand of great strength and firmness. 



Screw motions ; several powers ; in perfect condition. Price £2$. j 



Shows companion to Rigel, &c. — Address Polaris, Office of Natuhe i 



Bedford Street, Covent Garden, London. 1 



NEW ATHEN>EUM CLUB 



FOR GRADUATES OF UNIVERSITIES AND MEMBERS OF 



SCIENTIFIC SOCIETIES. 



The SECOND 500 MEMBERS are now being ADMITTED. 



The Club being proprietary. Members incur no pecuniary liability beyond 

 the Admission Fee and Annual Subscription. 

 For Prospectus and Form of Application for Membership apply to 



J. LOGAN LOBLEY. Secretary. 

 26, Suffolk Street, Pall Mall, S.W. 



UNIVERSITY OF LONDON. 



CHEMISTRY.— PRELIMINARY SCIENTIFIC AND FIRST B.Sc._ 



A Special Class in the above subject will be commenced on TUESDAY, 

 February 25, by THOMAS ELTOFT, F.C.S., F.C.I., late Senior Chemical 

 Assistant (eight years), St. Bartholomew's Hospital. Class will meet on 

 Tuesdays and Saturdays at 2 p.m. up to the July Examinations. Evening 

 Classes on same days at 7 p.m. 



Fees: Lectures, ^ijJs 3^. ; Practical Chemistry, including use of Apparatus 

 and Chemicals, £^ 4J. ; for both Classes, £6 6s. Private Work by arrange- 

 ment. Classes held at 55, Torriano Avenue, Camden Road, N.W. 



LABORATORY, 38, GRACECHURCH STREET, LONDON, E.C. 



A. ANTHONY NESBIT, F.C.S., 



WATER ANALYST, 



Performs every description of Water Analysis on moderate terms. 



Properly cleansed bottles for the reception of samples sent to any part of 

 the Kingdom. 



NOTICE OF REMOVAL. 

 MESSRS. S. & B. SOLOMONS, Opticians 



to the Government, have REMOVED from No. 39, Albemarle Street 

 (where they have been established over 50 years), to 



61, PALL MALL 



(Opposite MARLBOROUGH HOUSE). 



Specialties.— The £5 ASTRONOMICAL TELESCOPE, Microsco- 

 pical and Philosophical Instruments, high-class Gold and Steel and other 

 TINTED SPECTACLES. 



DIAMONDS IN MATRIX. 



R. C. NOCKOLD, Diamond and Oriental Stone Cutter and Dealer, has 

 for sale specimens of the above ; also Cut Precious Stones in all Colours. 

 T2, FRITH STREET, SOHO, W. 



HOW to MAKE a TELESCOPE, a MICRO- 



SCOPE, and a MAGIC LANTERN. How to TAKE a PHOTO- 

 GRAPHandPRINT aCARTE, seelLLUSTRATED CATALOGUE, 

 now ready, 3 stamps. Containing full direction for above, and how to 

 TRANSFER LANTERN SLIDES. 



J. LANCASTER & SON, Bull Street, Birmingham. 



The LANCASTER ELECTRIC LAMP, de- 

 vised by W. J. LANCASTER, F.C.S., F.R.A.S., &c., in three sizes. 

 No. I, to bum 3 hours, £2 ar. ; No. 2, to bum 6 hours, £3 3s. ; lai^est 

 size, £5 ss. Set of za Quart Bunsen's Cells, £4 4^. Model Electric 

 I Lamp and 10 Cells, £2 12s. 6d. 



