March 20, 1879] 



NATURE 



cllx 



JAMES WOOLLEY, SONS, & CO., 



(^, MARKET STREET, MANCHESTER. 



CHEMICAL APPARATUS AND REAGENTS 



For Lecture and Class Demonstration, Laboratory Instruction, &c. 



SETS OF APPARATUS AND CHEMICALS 



For the various Public Examinations. 



Portable Chemical Cabinets adapted for private study. 



Price Lists on Application. 



g^ O. TISLEY & Co. 



OPTICIANS, '' 

 X72, BROMPTON ROAD, S.W. 



{Close to South Kensington Museum). 



THE PHONEIDOSCOPE 



An lastrumeut for Obsemng the Colour-Figures of Liquid Fdms tmder the 



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, DescriptiTC 



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



MANUFACTURED AND SOLD WHOLESALK AND RETAII. BY 



S. C. TISLEY & CO., 172, BROMPTON ROAD. LONDON, S.W. 

 TELEPHONIC ELECTRICITY. AU Materials suppUed for exper'- 

 mental purposes. 



Price Lists of Electrical and Actmstic Apparatus, "aiith Dra-wings and 

 Description 0/ the Harmonos^raph, Post Free, 2d. 



MICROSCOPIC OBJECTS. 



Horn Sections, Blood Discs, Feathers, Hairs, Sections of Bone and Teeth, 

 Fish Scales, Anatomical Preparations from the Himian Subject and Lower 

 Animals, Palates of MoUusca, Sections of Shells and Pearls, Polyzoa, whole 

 Insects, Parasites, parts of Insects, Ossicula, Spines, &c., of Echlnoder- 

 mata. Spicules of Sponges and Gorgonias, Foraminifera, Botanical Prepara- 

 tions, Diatomacese, Salts, Crystals, Sections of Rocks, Fossils, Minerals, 

 &c 



Ochreous Iron in Moss-lSce Forms in Calcite, is. 6d. post-free. 



Stellar Mica, or Canadian Phlogopite, is. 3d. post-free. 



Catalogues firee. 



THOS. D. RUSSELL, 



48, ESSEX STREET, STRAND, LONDON, W.C. 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE J4S- PORTABLE TIN CASE FOR DliTO, 2s. 6d. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, 



5, ST. BRIDE ST. {late 2, Foster Lane), LONDON. 



DIAMONDS AND OTHER PRECIOUS 



STONES. Scientific opinion givenas to GENUINENESS, PURITY, 

 and VALUE.— Bbyck Wright, §0, Great Russell Street, London. 



HOLLOWAYlS PILLS 



THIS 



MEDICINE 



Is a Certain Cure for all Disorders of the LIVEE, STOMACH 

 AND BOWELS. A Great PUEIFIES of the BLOOD; a 

 Powerful Invigorator of the System, in cases of WEAEITESS 

 AND D E H TT . T TY, and I3 ue^uaMed in Female Complaiata, 



EAGLE INSURANCE COMPANY, 



79, PALL MALL. 

 For Lives only. Established iZc-j. 



Net Premiums and Interest - ... .- ;C396.8i8 



Accumulated Funds ... ... ... ... ... ;£3,o83,a8i 



Also a Subscribed Capital o£ more than ... ... ... .~ >^i, 500,000 



Reports, JVospectuses, and Forms may be had at the Office, or from any 

 of the Company s Agents, post free. 



GEORGE HUMPHREYS. Actuary and Secretary. 



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 descriptions for Lecture Purposes 



Loaned out. 



FOR CLASS 



DEMON- 



APPARATUS 



ST RATION and for SCIENCE SCHOOLS. 



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. 



PROF. S. P. THOMPSON'S LANTERN 



SLIDE GALVANOMETER, 20J. 



EDISON'S ELECTRIC PEN £8 8s. 



ELECTRIC and MAGNETIC APPA- 

 RATUS of all Descriptions. 



New Illustrated Catalogue of 60 pages post free 6 stamps. 

 Orders over £2 carriage paid to any part of the United Kingdom. 



EUDOLPH KOBNIG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMENTS. 



TO ILLUSTRATE THE LAWS 

 AND TO PRODUCE THE PHENOMENA OF SOUND. 



PARIS, 26, RUE DE POHTOISE. 



PRICE LISTS FREE. 



W. L A D D & C O., 



Scientific Instrument Manufacturers 



(By Appointment to the Royal Institution of Great Britain), 



II & 12, BEAK STREET, REGENT STREET, W. 



BYRNE'S PATENT COMPOUND PLATE PNEU- 

 MATIC BATTERY for Cautery and general purposes. 



EDMUNDS' PHONOSCOPE for makicg Vocal Vibra- 

 tions visible in a Vacuum Tube. 



HUGHES' MICROPHONE. 



TELEPHONIC APPARATUS, &c. 



LADD'S IMPROVED SELF-CHARGING HOLTZ 

 ELECTRICAL MACHINE, with 4 to 12 Plates, in- 

 closed in a Mahogany and Glass Case. This in.stniment is 

 immediately available in any condition of the atmosphere. 

 Philosophical Apparatus of every Description. 



Illustrated Catalogue, Sixpence. 



HORNE'S POMPBIAN DECORATIONS. 



ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.C. 

 By Special Appointneat t* His M^^'esty tbe King of Italy. 



