liv 



NATURE 



{June 12, 1879 



THE TELEPHONE COMPANY, LIMITED, 



36, COLEMAN STREET, LONDON, E.G. 



TESTIMONIALS. 



14S to 149, Tottenham Court Road, London, W., 14/A May, 1879 

 To the TF.LEriioNE Company, Limited, 36, Coleman Street, E.C. 



Dear Sirs,— You will be pleased to hear that the forty Telephones you supplied answer admirably, and are of great con- 

 venience, communicating as they do in some cases with cur workshops a mile away. 



The simplicity and ease with which they work, being able to be used by any one, and the great advantage over the Telegraph 

 system in rapid cbmmunication and recognition of the voice, must create a great demand for Telephones everywhere. — We remain, 

 dear Sirs, yours faithfully, (Signed) J. MAPLE & Co, 



Midland Railway Telegraph Department, Superintendent's Office, Derby, Q,%th April, 1879 

 Dear Sirs, — In reply to your inquiry of the 25th inst, I have the pleasure to inform you that the Telephones which have 



been erected on the Midland Railway are working very satisfactorily. — Yoiu-s faithfully, (Signed) W. LANGDON 



The Telephone Company, 36, Colanan Street, London, E, C. 



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



PROFESSOR HUGHES' AUDIOMETER. 



The only perfect measurer for testing the hearing power. Vide DR. RICHARDSON'S Report to the Royal Societj', 

 May IS, 1879 ; Medical Times and Gazette, May 24, 1879. 



SOLE AUTHORISED MAKERS, 



KROHNE & SESEMANN, 



8, DUKE STREET, MANCHESTER SQUARE, LONDON, W. 



ADVERTISING. 

 C. H. MAY Sc C O., 



GENERAL ADVERTISING OFFICES, 

 78, GRACECHURCH STREET, LONDON, E.C. 



(The only Address.) 

 ESTABLISHED 1846. 



Advertisements of every description received for Insertion in all News- 

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

 papers. 



Estimates for General Advertising, Reduction for a series. 



Liberal terms to large advertisers. 



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

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

 required. 



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

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

 ness of insertion to all Advertisements entrusted to them. 



The Press Manual for 1879, containing a complete List of Newspapers 

 published in the United Kingdom. Post free, dd. 



DARTON'S 

 GUINEA ANEROID, 



With Thermometer. Dial is divided off to 

 looths of an inch. Accurate and sensitive. 

 Each instrument tested in presence of cus- 

 tomer, if required. Price 2i,r. The same, 

 mounted in Carved Oak Frame, various pat- 

 terns, 425-. and 63*. 



IlbtstratioJis and Prices on Application, 



F. DARTON & CO., Makers, 



45, ST. JOHN STREET, E.C 



WORKS-ST. JOHN'S LANE. 



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 MoUusca, Sections of Shells and Pearls, Polyzoa, whole 

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

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

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

 &c. 



Ochreoui Iron in Moss-like Forms in Calcite, iJ. id. post-free. 



Stellar Mica, or Canadian Phlogopite, if. 3</. post-free. 



Catalogues free. 



THOS. D. RUSSELL, 

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



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 /or 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 ASSORTMENTofRUHMKORFF 



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, los. 



EDISON'S ELECTRIC PEN £8 8s. 

 ELECTRIC and MAGNETIC APPA- 



RATUS of all Descriptions, 

 New Illustrated Catalogue of do pages post free 6 stamps. 

 Orders over ;Ca carriage paid to any part of the United Kinirdom. 



LABORATORY, 38, GRACECHURCH STREET, LONDON, E.C 



A. ANTHONY NESBIT, F.C.S., 



WATER ANALYST, 



Performs every description of Water Analysis on moderate terms. 



Properly cleansed bottles for the reception of samples sent to any part of 



the Kingdom. 



EAGLE INSURANCE COMPANY, 



79, PALL MALL. 

 For Lives only. Established 1807. 



Net Premiums and Interest «• ••• •« ;^396,8i8 



Accumulated Funds ... ,- « ;f3,o83,2Si 



Also a Subscribed Capital of more than ^£1,500,000 



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

 of the Company s Agents, post free. 



GEORGE HUMPHREYS. Actuary and Secretary. 



