Ixxxviil 



NATURE 



{Jan. 1 6, 1879 



THE TELEPHONE COMPANY, LIMITED, 



36, COLEMAN STREET, LONDON, E.G. 

 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, &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. 



CHEMICAL APPARATUS-SCIENTIFIC INSTRUMENTS. 



Porcelain, Glass, Stone, and Metal Apparatus for Chemical and Philosophical Purposes and Lectures. 

 ELECTRICAL, MEDICAL, AND EXPERIMENTAL COILS AND APPARATUS. 



BUNSEN'S MODIFIED FILTER PUMPS, from IGs. Sd. to 67s. 



ELECTRIC LAMPS FROM 35s. UPWARDS, AND BATTERY OF 40 QUART BUNSEN'S CELLS FOR SAME AT £8. 



GEISSLER'S TUBES. 



Catalogues and Illttstrations ivill be sent gratuitously. A Liberal Discount allorued to Wholesale Buyers. 



WHOLESALE IMPORTERS and MANUFACTURERS, 



Sets of Apparatus 

 according to Professor 

 Valentin's " Book of 

 Chemistry," Professor 

 Attfield's " Manual of 

 Chemistrj'," &c., always 

 in stock. 



AUG. BEL and CO., 



Sole Agents for Grenet's Batteries, and Contractors to the Government. 



34, Maiden Lane, Southampton St., Strand, W.C. 



Sets of Apparatus as 

 required by the Govern- 

 ment Schools always 

 ready and kept in stock. 



CAILLETET'S APPARATUS FOR L IG^U EF ACT ION OF OASES- 



For the convenience of Teachers and Students at the Sjuth Kensington Classes, the Science and Art Department has authorized us to keep a stock in 

 the store-room, first floor of the building, where the different sets and other articles are always ready for delivery. 



CHEMICAL & PHYSICAL APPARATUS 



BOTTLES, PURE CHEMICALS, 



And every requirement for Science Classes, Private Study, or Business 



Purposes. 



Illustrated Priced Catalogues post free for six stamps. 



Carriage allowed to any station in England or Wales, on orders of 401. 



value and upwards. 



MOTTERSHEAD AND CO. 



7, EXCHANGE STREET, & 10, HALF MOON STREET, 

 MANCHESTER. 



DRAPER'S INK (DICHROIC). 



THE NEW BLACK INK 



DIFFERING FROM ANYTHING ELSE EVER PRODUCED. 

 Writing becomes a pleasure when this Ink is used. It has been adopted 

 by the principal Banks, Public Offices, and Railway Companies throughout 



Ireland. 

 It writes' almost instantly Full Black. I Flows easily from the Pen. 

 Does not corrode Steel Pens. Blotting-paper may be applied at the 



Is cleanly to use, and not liable toBlot. i moment of writing. 



Can be obtained in London, through Messrs. Barclay & Sons, Farring- 

 don Street; W. Edwards, Old Change; F. Newbery & Sons, Newgate 

 Street; Wm. Mather, London and Manchester; J. Austin & Co., Duke 

 Street, Liverpool ; and Stacy & Cook, Paternoster Row ; and to be had of 

 all Stationers. 



BEWLEY & DRAPER (Limited), Dublin. 



MICROSCOPES, OBJECTIVES, &c. 



CENTENNIAL EXHIBITION, PHILADELPHIA, U.S.A. 



The Medal and Highest Award has been given for Design, 

 Construction, Optical Excellence, and Moderation in Price, t« 



HENRY CROUCH, 



66, BARBICAN, LONDON, E.G. 



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

 Mailed abroad free. 



JAMES WOOLLEY, SONS, & CO., 



69, 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 sttidy. 



Price Lists on Application. 



EDWARD PATERSON, 



Electrical Engineer and Scientific Appamtus 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. 



APPARATUS FOR CLASS Demon- 

 stration and Tor 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 ()0 pages post free 6 stamps. 

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



Printed by R. Clay, Sons, and Taylor, at 7 an! 8, Bread Street 

 M/.CMILI.AN AND Co., at t'.ie O.iice, 29 ani 3j, Eedfu 



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

 ■rd Street. Covent Garden.— Thi/rsday, J.inuary i6, 1879 



