XCVl 



NATURE 



\_yan. 23, 1879 



THE TELEPHONE COMPANY, LIMITED, 



36, COLEMAN STREET, LONDON, E.C. 

 SOLE PROPRIETORS OF BELL'S AND OTHER PATENTS. 



Telephones and all necessary Instruments Supplied for Domestic or Business Purposes, on Sale or Rental. 



Estimates can be obtained for fitting up Telephonic Communication in Mines, Factories, Workshops, or Private 

 Dwellings ; also for Lines of Wire Communicating between Lighthouses and the Shore ; Shipping Offices and Vessels 

 in Port ; Noblemen's Mansions and their Lodges, Stables, or Gamekeepers' Residences, 4:c., &c. 



Agents Wanted. — A Liberal Discount allowed to the Trade. 



Proceedings will be taken against all Persons selling or using any Telephones, or otherwise infringing the 

 Company's Patents. 



Application for Price Lists or further information to be made to the Manager. 



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. 



Electrual Apparatus of all descriptions for Lecture Purposes 



Loaned out. 



APPARATUS FOR CLASS Demon- 

 stration 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, 30J. 



EDISON'S ELECTRIC PEN £8 8s. 

 ELECTRIC and MAGNETIC APPA- 

 RATUS of all Descriptions. 

 New Illustrated Catalogue of ()0 pages post free 6 stamps. 

 Orders over £1 carriage paid to any part of the United Kingdom, 



MICROSCOPES, OBJECTIVES, &c. 



CENTENNIAL EXHIBITION. PHILADELPHIA, U.S.A. 



The Medal and Highest Award has been given for D^ign, 

 Construction, Optical Excellence, and Moderation in Price, to 



HENRY CROUCH, 



66, BARBICAN, LONDON, E.C. 



FuHy Illustrated Catalogue and full Instructions by Post, 6 Stamps. 

 Mailed abroad free. 



EUDOLPH KOENIG, 



(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. 



HORNE'S POMPEIAN DECORATIONS. 



ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.C. 



By Special Appointment to His Majesty the King of Italy. 



JOHN NORMAN, 



MANUFACTURER OF 



MICROSCOPES, OBJECTS, CABINETS 

 TABLES, LAMPS, 



And all Glass Appliances for Microscopes, 

 HAS OPENED NEW AND EXTENSIVE PREMISES AT 



123, Queen Victoria Street, E.C. 



Lists post free on application. 



JAMES WOOLLEY, SONS, & 



69, MARKET STREET, MANCHESTER. 



CO.. 



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. 



MICROSCOPIC OBJECTS. 



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

 Fish Scales, Anatomical Preparations from the Human Subject and Lower 

 Animals, Palates of Mollusca, Sections of Shells and Pearls, Polytoa, whole 

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

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

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

 &c. 



Ochreous Iron in Moss-like Forms in Calcite, i*. 6d. post-free. 



Stellar Mica, or Canadian Phlogopite, is. j/i. post-free. 



Catalogues free. 



THOS. D. RUSSELL, 



48, ES SEX STREET. STRAND, LONPON, W.C. 



^.O.T18LEY&Co., 



OPTICIANS, 



172, 



S.W. 



BROMPTON ROAD, 



(Close to South Kensington Museum). 



THE PHONEIDOSCOPE. 



An Instrument for Observing the Colour-Figures of Liquid Fdms under th« 



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, DescriptiTe 



Pamphlet, &c., in Card'joard Box, lox. ftd. 



MAHUFACTURED AND SOLD WHOLKSALK AND »KTAIL BY 



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

 TELEPHONIC ELECTRICITY. All Materials supplied for experi- 

 mental purposes. 

 Price Lists of Electrical and Acoustic Apparatus, vnth Drawings and 

 Description of the Harmonoeraph, Post Free ad. 



DIAMONDS AND OTHER PRECIOUS 



STONES. Scientific opinion given as to PURITY and VALUE.— 

 Bryck Wwght, 90, Great Russell Street London. W.C. 



Printed by R. Clav, Sons, and Taylor, at 7 and 8, Bread Street 

 Macmili.an AND Cc, at the Office, 29 and 30, Bedford 



Hill Queen Victoria Street, in the City of Londom, and published by 

 Street. Covent Garden.— Thursday, January 23, 1879. 



