At(s^ust 21, 1879] 



NATURE 



cxxxvn 



FLETCHER'S 



SOLID FLAME BURNER. 



FOR COOKING, LABORATORY WORK, 



SMALL STEAM ENGINES, 



ZINC AND LEAD MELTING, &c. 



The most perfect burner known, will burn in one SOLID 

 flame any quantity of gas, and is by far the cheapest both in 

 first cost and economy of gas. Made in all sizes, in both brass 

 and iron for all purposes. 



ILLUSTRATED LIST ON APPLICATION. 



ALSO or 



GAS FURNACES FOR ALL PURrOSES, 



INSTANTANEOUS WATER HEATERS, 



HOT AND COLD BLAST BLOWPIPES, 



AUTOMATIC FOOT AND HAND BLOWERS, &c. 



THOS. FLETCHER, 



MUSEUM STREET, WARRINGTON. 



JOHN NORMAN, ~ 



MANUFACTURER OF 



MICROSCOPES, OBJECTS, CABINETS, 



TABLES, LAMPS, 



And all Class Appliances for Microscopes, 



HAS OPENED NEW AND EXTENSIVE PREMISES AT 



34, Whitecross Street, Cripplegate, E.G. 



Lists post free on application. 

 NOW READY, 



SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE At. id. POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS; 



ILLUSTRATED, CLASSIFIED, DESCRIPTIVE. 



Demy 8vo, 480 pp.. Illustrated with 1,600 Woodcuts. 



Mtst Complete and Clieapest List of Apparatus. 



JOHN J. GRIFFIN and SONS, 22, GARRICK STREET, 

 LONDON, W.C. 



ADVERTISING. 

 C. H. MAY 8c CO., 



GENERAL ADVERTISING OFFICES, 

 78, GRACECIIUKCU STREET. LONDON, E.C. 

 (The only Address.) 

 ESTABLISHED 1846. 

 Advertltements of every description received for insertion in all News- 

 papers, Magasiues, Reviews, &c., at the same rates as at the offices of the 

 papers. 

 Estimates for General Advertising. Reduction for a scries. 

 Liberal terms to lar^e adverti?crs. 



Advertisements are also received for all newspapers, which may be ad- 

 dressed to these Offices, without extra charge, and replies forwarded, if 

 raquircd. 



C H. MAY & CO., having special communication with the leading news- 

 papers three times daily, can guarantee the utmost promptitude and correct- 

 neu of insertion to all Adverti'.ements entrusted to them. 

 The Presc Manual for 1879, conuining a complete List ©f Newspapers 

 published in the United Kingdom. Post &ce, 6</. 



Now ready, a Revised Edition. 



NEGRETTI & ZAMBRA'S 



ENCYCLOPEDIC 



Illustrated and Descriptive 

 CATALOGUE OF 



SCIENTIFIC INSTRUMENTS. 



(Containing very numerous Comparative Tables of Reference and 



Illustrated by upwards of TWELVE HUNDRED ENGRAVINGS, 



Six Hundred Pages, Royal 8vo, cloth, gilt lettered, Price ss. 6^'.) 



Of tical, Mathematical, Philosophical, Photographic, 



AND 



STANDARD METEOROLOGICAL 

 INSTRUMENTS. 



MANUFACTURED AND SOLD BY 



NEGRETTI AND ZAMBRA, 



Opticians and Scientific Instrument Makers to 



The Royal Observatory, Greenwich; the Admiralty ; Hon. Board of Ordnancet 



Board of Trade ; the British Meteorological Society; the Observatories 



Kew, Toronto, Washington, Victoria; East Indian Government. 



HOLBORN VIADUCT, E.C. 



ALSO AT 



45, CORNHILL, E.G., & 122, REGENT STREET, W., 

 LONDON. 



NEW ILLUSTRATED CATALOGUE of ELECTRIC 



SIGNALS. &c., with Instructions for Fixing. 150 Diagrams. Just out, 

 post free, 6 Stamps. 



EDWARD PATERSON, 



Electrical Engineer and Scientific Apparatus Manufacturer, 



3, BEDFORD COURT, COVENT GARDEN, LONDON 



STEAM WORKS, GRAY'S INN ROAD. 



Experiments in Electric Lighting carried out. 



Electrical Apparatus of all Descriptiojis for Lecture Purposes Loaned out. 



APPARATUS for CLASS DEMONSTRATION and for SCIENCE 



SCHODLS. 

 ELECTRIC LIGHT APPARATUS. 

 SIEMEN/S and GRAMME'S DYNAMO MACHINES and LAMPS 



for Hire and Purchase. 

 LARGE ASSORTMENT of RUHMKORFF COILS and VACUUM 



TUBES. 

 PROFESSOR HUGHES' MICROPHONE. 

 ELECTRIC BELLS and INDICATORS. 

 TELEPHONES and TELEPHONE CALL BELLS, WIRE, &c., for 



Fixing. 

 EDISON^S ELECTRIC PEN i.% 8j. 



ELECTRIC and MAGNETIC APPARATUS of all Descriptions. 

 Illustrated Catalogue Electrical App.aratus, Part t. Post free, 6 Stamps, 

 do do Electric Signals, Pari 2. Post free, 6 Stamps. 



S. O.TISLEY* Co. 



OPTICIANS, ' 

 172, BROMPTON ROAD, S.W. 



(Close to South Kensington Musetiin). 



THE PHONEIDOSCOPE 



An InstnimcDt for Observing the Colour- Figures of Liquid Films under tho 

 action of Sonorous Vibrations. 



Being a visible demonstration of the Vibratory and Molecular Motion of a 

 Telephone Plate. 

 The PHONEIDOSCOPE, with 3 Discs, Bottle of Solution, De»criptiv« 

 Pamphlet, &c., in Cardboard Box, lof. td. 



MANUFACTURED AND SOLD WHOLBSALB AND RETAIL BY 



S. C. TISLEY & CO., 17a, BROMPTON ROAD, LONDON, S.W. 



TELEPHONIC ELECTRICIIY. AU Materials supplied for experi- 

 mental purposes. 



Prit4 Litis 0/ Electrical and Atautttc Appmrmt^t^ with Dtmwing* mtd 

 Dt$9ripti0n #/" ihi Hmrm«n*traph, P^tt Fnt, 9d* 



