clxxxvi 



NATURE 



\Oct. 2, 1879 



EAGLE INSURANCE COMPANY, 



79, PALL MALL. 

 For Lives onlv. Established 1807. 

 Net Premiums and Interest ,««,.««..««. ;f 396,818 

 Accumulated Funds ,„».h.»*«m.h.h. ;£3, 083.381 



Also a Subscribed Capital of more than ... ». ^1,500.000 



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

 o£ the Company s Agents, post free. 



GEORGE HUMPHREYS, Actuary and Secretary. 



NOTICE OF REMOVAL. 



JAMES HOW & CO., 



SCIENTIFIC INSTRUMENT MAKERS 



73, FARRINGDON ST., LONDON 



(I..ATE OF s, St. Bride St., and 2, Foster Lane). 



HOWS STUDENT'S MICROSCOPE. HOW'S MICROSCOPE LAMP. 



Rock Sections and other Objects for the Microscope. 



W. F. STANLEY, 



Mathematical Instrument Manufacturer 



To H.M.'s Government, Council of India, Science and Art 

 Department, Admiralty, &c. 



Mathematical, Drawing, and Surveying Instruments of every description, of 

 the highest quality and finish, at the most moderate prices. 



Price List post free. Engine Divider to the Trade. 

 ADDRESS- 

 GREAT TURNSTILE, HOLBORN, LONDON, W.C. 



M. JACKSON & CO., 



(J. ORME and H. M. CAPNER) 

 MANUFACTURERS AND IMPORTERS OF 



SCIENTIFIC APPARATUS 



AND 



CHEMICALS. 



Sole Agents for Hicklev's Patent Telephones, 



Price 50f. per Pair, Cash with Order. 



Price Lists sent on receipt of Three Stamps for Postage. 



For Trade Terms inclose Business Card. 



65, BARBICAN, LONDON, E.G. 



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 Descriptions for Lecture Purposes Loaned out. 

 APPARATUS for CLASS DEMONSTRATION and for SCIENCE 



SCHOOLS. 

 ELECTRIC LIGHT APPARATUS. 

 SIEMEN'S and GRA.MME'S DYNAMO M.\CHINES and LAMPS 



for Hire and Purchase. 

 LARGE ASSORTMENT of RUHMKORFF COILS and VACUUM 



TUBES. 

 PROFESSOR HUGHES' MICROPHONE. 

 ELECTRIC BELLS and INDICATOR.^;. 

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



Fixing. 

 EDISON's ELECTRIC PEN 1% 8j. 



ELECTRIC and MAGNETIC APPARATUS of all Descriptions. 

 Illustrated Catalogue Electrical Apparatus, Part i. Post free, 6 Stamps, 

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



S. O.TISLEY <£ Co. 



OPTICIANS, ■' 

 172, BROMPTON ROAD, S.W. 



(Close to South Kensington Museum). 



THE PHONEIDOSCOPE 



An Instrument for Observing the Colour-Figures of Liquid Films under the 



action of Sonorous Vibrations. 

 Being a visible demonstration of the Vibratory and Molecular Motion o :" a 

 Telephone Plate. 

 The PHONEIDOSCOPE, with 3 Discs, Bottle of Solution, Descriptive 

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



MANUFACTURED AND SOLD WHOLESALE AND RETAIL BY 



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

 TELEPHONIC ELECTRICITV. All Materials supplied for experi- 

 mental purposes. 

 Prue Lists of Electrical and Acoustic Apparatus, tuitk Drawings and 

 Description of ike Hatntonozraph, Post Free, zd. 



A CERTAIN 

 EEMEDY 



For BAD BREASTS, OLD WOUNDS, and SORES. If 

 effectually rubbed on the Neck and Chest, it cures SOE£ 

 THROATS, BRONCHITIS, COUGHS and COLDS; and for 

 GOUT, RHEUMATISM, aid all Skin Diseases it is unequalled. 



W. LADD c& CO., 



SCIENTIFIC INSTRUMENT MANUFACTURERS 

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

 II AND 12, BEAK STREET, REGENT STREET, W. \ 



IMPROVED HOLTZ ELECTRICAL MACHINES, with 4 to 24 Plates, Immediately available in any condition of the atmo-sphere. 

 LADD'S DYNAMO-MAGNETO MACHINE and GRAMME'S MAGNETO-ELECTRIC MACHINE for Laboratory use. 



Physical Apparatus of every Description. 

 ILLUSTRATED CATALOGUE, SIXPENCE. 



THE TELEPHONE COMPANY, LIMITED, 



36, COLEMAN STREET, LONDON, E.G. 



TESTIMONIALS. 



145 to 149, Tottenham Court Road, London, W., \^h May, 1879 

 7t> M^ Telephone Company, Limited, 36, Coleman Street, E.C. 



Dear Sirs, — Yon 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 our 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 communication 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, 2SM April, 1879 



Dear Sirs, — In reply to your inquiry of the 2Sth inst., I have the pleasure to inform you that the Telephones which have 

 been erected on the Midland Railway are working very satisfactorily. — Yours faithfully, (Sigtied) W. LANGDON _, 



The Te:.ephone Company, 36, Coleman Street, London, E. C. 



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



