cxiv 



NATURE 



{_Feb. 13, 1879 



MICROSCOPIC OBJECTS 



Of tuperlative 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. 

 KDMUND WHEELER, 48N. ToUington Road, Holloway, London, N. 



GEOLOGICAL SOCIETY OF LONDON. 



The ANNIVERSARY MEETING of this Society will be held at the 

 Society's Apartments, P.urlington House, on FRIDAY, February 21st, at 

 I o'clock ; and the ANNUAL DINNER will take place the same Evening, 

 at "The Criterion," Piccadilly, at 6 o'clock. 



Members and Visitors intending to dine are requested to leave their names 

 at the Society's Apartments. 



SUNDAY LECTURE SOCIETY.— LEC- 



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

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

 February 16. — A. Ellev Finch, Esq., on "The English Freethinkers 

 of the Eighteenth Century." — Members' Annual Subscription, £\. 

 Payment at the Door — One Penny, Sixpence, and (reserved seats) One 

 Shilling. 



TUITION for the UNIVERSITIES and 



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

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



s.\v. 



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. 



A GENTLEMAN desires to take Lessons 



by Correspondence in Mathematics (elementary and subsequently ad- 

 vanced) from a Graduate of London or Cambridge in mathematical 

 honours and teacher of some experience. A satisfactory reason for 

 preferring this mode of instruction can be adduced. — State terms, &c., 

 to Descartes, London Institution, E.C. 



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 2nd 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 prepariBjt 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. Circles, 3J. td. per ounce ; Squares, 

 2j. gd. ; post free 2d. extra ; (jround-edged Slips, 5*. per gross ; also 

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

 PETIT, isi, 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, 

 Ludgate HiU, London. 



jygTIN WINSOR. Li1»rari|g. 



^VITHERNDEN SCHOOL, CATERHAM 



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

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



LARGE INDUCTION COIL, by Ladd^ 



About 14 miles of Wire. In perfect condition, with Condenser. Price 

 £\%. May be seen at Mr. Yeates', 33, King Street, Covent Garden. 



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. 

 12, FRITH STREET, SOHO, 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 some root-fibres covered 

 with adherent living organisms, with diagrammatic sketches. He has also 

 sent out embryo Trout in the alevln stage, wonderfully transparent ; also 

 SpongiUa, Floscularia, Stephanoceros, Philcdina, Nitella, &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 Fine Instru- 



ment, 3J Objective, on Parallactic Stand of great strength and firmne 

 Screw motions ; several powers ; in perfect condition. Price / 

 Shows companion to Rigel, &c. — Address Polaris, Office of Natl' 

 Bedford Street, Covent Garden, London. 



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, Micro- 

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

 TINTED SPECTACLES. 



The LANCASTER ELECTRIC LAMP, dc 



vised by W. J. LANCASTER, F.C.S., F.R.A.S., »c., in three ti; 

 No. I, to bum 3 hours, ;£2 is. ; No. 2, to burn 6 hours, {^-^ ^s. ; larr 

 size, £5 5-r- Set of 20 Quart Bunsen's Cells, £4 ^s. Model Electr 

 Lamp and 10 Cells, £2 12s. 6d. 



HOW to MAKE a TELESCOPE, a MICRO- 



SCOPE, and a MAGIC L.\NTERN. How to TAKE a PHOT 

 GRAPH andPRINTaCARTE.seelLLUSTRATEDCATALOGl 

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

 TRANSFER LANTERN SLIDES. 



J. LANCASTER & SON, Bull Street, Birmingham. 



SHEPPEY FOSSILS. 



W. H. SHRUBSOLE, Sheerness-on-Sea, respectfully intimates t' 

 the appeal recently made by him has been so heartily responded to, that he 

 cannot receive any more orders for " extra selected " specimens at present. I 



Orders for loj. Collections of 100 "good" specimens can be executed 

 without delay. 



"NOTES ON THE GEOLOGY OF SHEPPEY" post free on a?: 

 cation. 



MINERALOGY AND GEOLOGY. 



A New List of Collections of Fossils, Minerals, and Rocks now rea 

 including Special Collections to illustrate the various Text-books, 

 Cabinets. List of Sections cf Rocks for the Microscope. Blowpipe Af } 

 ratus and Materials of all kinds in Cases or separately. New Pattern-; 

 Geological Hammers, with prices. List of New and Second-hand Books 



JAMES R. GREGORY, 



MUSEUM OF GEOLOGY, 



88, CHARLOTTE STREET, FITZROY SQUARE 

 MINERALOGY AND GEOLOGY. 



24 assorted Minerals for Blowpipe Experiments, with printed List. 

 Pocket Case, 2^. ; 24 ditto (second series), 2S.; Moh's Scale of Hardr 

 cf Minerals, 9 Specimens with File and streak tablet in a convenient C: 

 4S.; von Kohbell's Scale of Fusibility of Minerals, 6 Specimens in Peel; 

 Case, 2S. ; _ Geological Collecting Bag complete, 4s.; Ditto Hamme 

 Holder and Strap, 2.J. Geological Charts, Books, Hammers, Chiselsj 

 Lenses, Acid Bottles, Glass-capped Boxes, Cement for Mounting and Re 

 pairing Fossils, Tablets, Card Trays, &c., &c. Minerals, Fossils, .-' 

 Rocks, sent en approval and for selection to all parts of the world. , 

 THOMAS J. DOWNING, 

 38, WHISKIN STREET. LONDON, E.C. 

 catalogues free. 



^ 



ELECTRICAL & SCIENTIFIC APPARA 



TUS for AMATEURS and the TRADE.— Microphones of every fcr 

 from i^. 6d. New cheap Electric Lamps and Batteries. Inducti 

 Coils and Frictional Machines are specialties. Electrical Bells, F 

 and Thief Alarms, and Automatic Switch-boards. Magnets, Cover 

 Wires, Screws, and all Materials. Apparatus for Science Teache; 

 Illustrated > Catalogue, one stamp. Repairs and Alterations. Appar 

 tus made to sketch.— DALE & CRAMPTON, Manufactunng tie 

 tricians, 4, Little Britain, E.C. 



