yuly 24, 1879] 



NATURE 



• •• 



cut 



THE TELEPHONE COMPANY, LIMITED. 



36, COLEMAN STREET, LONDON, E.G. 



TESTIMONIALS. 



14S to 149, Tottenham Court Road, London, W., \i^h May, 1879 

 7<> //4<f Telephone 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 our workshops a mile away. 



1 ne 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 preat demand for Telephones everywhere. — We remain,, 

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



Midland Railway Telegraph Department, Superintendent's Office, Derby, 2%th 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, (Signed) W. LANGDON 



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



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



SIR JOHN LUBBOCK'S NEW BOOKS." 



8vo. 8^.'6rt'. 



SCIENTIFIC LECTURES, with Coloured Plate and numerous Illustrations. 



CONTENTS. 

 I. — On Flowers and Insects. 

 II. — On Plants and Insects. 

 III.— On the Habits of Ants. 

 IV. — ,, ,, (continued). 



V. — Introduction to the Study of Prehistoric Archa;olog)'. 

 VI. — Address to the Wiltshire Archaeological and Natural History Society. 



ADDRESSES, POLITICAL AND EDUCATIONAL. 8vo. s.. 6d. 



Contents. — On the Imperial Policy of Great Britain — On the Bank Act of 1844 — On the Present System of Public Schoo* 

 Education, 1876 — On our Present System of Element-ry Education— On the Income Tax — On the National 

 Debt — On the Declaration of Paris — Marine Insurances — On the Preservation of our Ancient National 

 Monuments — Egypt. 



MACMILLAN & CO., LONDON. 



On the xst of erery Month, price Sixpence. 



THE ENTOMOLOGIST: 



AN ILLUSTRATED JOURNAL OF BRITISH ENTOMOLOGY. 

 Edited by John T. Carringtoh, 

 With the Asftistance of 

 Fkbdekicx Bond, F.Z.S. | Frederick Smith, F.L.S. 



Edward A. Fitch. I J. Jenner Weir, F.L.S. 



John A. Power, M.D. | F. Buchanan White. M.D. 



The Eniotnologut was founded for the purpose of diffuting infonnatioa 

 with regard to the science generally, and especially respecting Insects in- 

 jurious to Farm or Garden; for Recording the Capture of Rarities; and 

 for Figuring Varieties. Monthly Lists of Duplicates and Desiderata are 

 published. 



Interesting articles on all branches of the science are promised by leading 

 entomologists. Especial attention is given to the printing of the Woodcut 

 Illustrations, which are numeroiu. There are occasionally Coloured 

 Plates, 



SIMPKIK, MARSHALL, and CO.. Stationers' Hall Court. 



ELECTRICAL, SCIENTIFIC, & PHOTO- 



GKAPIUC APPARATUS.— Electric Bells, Fire ard Thief Alarms, 

 and Automatic Switches. Induction Coils, P'rictional Machines, Lamps, 

 and Batteries. Microphones, Wires, Magnets, Carbons, and all Mate- 

 rials. Repairs and Alterations. New Illustrated Descriptive Catalogue, 

 one Stamp. Cameras, Dry Plates, Sensitive Paper, and all Chemicals. 

 Photo. List free.— DALE & CRAMPTON, Manufacturing Opticians, 

 4. Little Britain, London, E.C 



DIAMONDS AND OTHER PRECIOUS 



STONES. Scientific opinion givena. to GENUINENESS, PURITY 

 and VALUU.— Bkyce Wiiigkt, 90, Great Russell Street, Lmdol. 



HOLLOWAYS PILLS 



THIS 

 MEDICINE 



Is a Certain Core for aU SUorders of the LIV£B, 8T0HACH 

 AND BOWELS. A Oraat FUBIFIEB of the BLOOD; a 

 Powerful InTigorator of the System, is easct of WEAKNEgf 

 AKD SEBILITT, and ia naeqaalled in Female Cemplainta. 



With J 12 Engravings and s Maps of the Stars. 



popular astronomy. 



BY 



PROFESSOR S. NEWCOMB, LL.D. 

 8vo, cloth, price i8j. 

 *' As aftording a thoroughly reliable foundation for more advanced reading. 

 Prof. Newconib's ' Popular Astronomy * is deserving of strong recommend- 

 ation. ** — Nature. 



" When we lake up a book written by one of the foremost astronomers, 

 mathematically and practically, of the day, we need not fear that, however 

 popular, it will be inexact in its language or evasive in its descriptions. Nor 

 are we disappointed in the book before ui. Throughout the whole of it we 

 are struck by the total absence of the defects so common in popular 

 writings. ... It IS unlike anything else of its kind, and will be of more use 

 in circulating a kni^wledge of astronomy than nine-tenths of the books 

 which have appeared on this subject of late yt2x%.**— Saturday Rtview. 

 MACMILLAN & CO., LONDON, 



0. TISLEY & Co. 



OPTICIANS, ' 

 172, BROMPTON ROAD, S.W. 



(Cljse to South Kensington Museum). 



THE PHONEIDOSCOPE 



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



action of Sonorous Vibrations. 



Beinz a visible demonstration of the Vibratory and Molecular Motion of a 

 Telephone Plate. 



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

 Pamphlet, ftc, in Cardboard Box, loj. <5</. 



MANUFACTURED AND SOLD WHOLISALE AND RETAIL BY 



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



TELEPHONIC ELECTRICITY. All Materials supplied for experi- 

 mental purposes. 



Price Lifts of Electrical and Acoustic Afparaius^ with Drawinzt and 

 Descriftion of the Harmonos^aph^ Post Free, ad. 



