Cll 



NA TURE 



\_7an. 30, 1879 



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 jor 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, 205. 



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 ;£a carriage paid to any part, of the United Kingdom. 



^ 0. TISLEY & Co. 



OP"riCIANB> '* 

 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 of a 



Telephone Plate. 



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



Pamphlet, &c., in C^d'joard Box, lox. (>d. 



MANUFACTURED AND SOLD WHOLK8ALK AND RETAIL BY 



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

 TELEPHONIC ELECTRICITY. All Materials suppUed for expert 

 mental purposes 



Price Litis of Electrical and Acjusttc Apparatus, ivith Dra-wings and 

 Description of the Harmonosraph, Post Free 2d. 



DIAMONDS AND OTHER PRECIOUS 



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

 Brvce Wright, 90, Great Russell Street, London. W.C. 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE Z4S. PORTABLE TIN CASE FOR DITTO, 2s. 6a. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, 



5. ST. BRIDE ST. {late 2, Foster Lane), LONDON. 



HOILOWAYS OINTMENT 



A CERTAIN 

 REMEDY 



For BAD BREASTS, OLD WOUNDS, and SORES. If 

 effectually rublied on the Neck and Chest, it cures SORE 

 THROATS, BRONCHITIS, COUGHS and COLDS; and for 

 GOUT, RHEUMATISU, and all Skin Diseases it is unequalled. 



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, to 



HENRY CROUCH, 



66, BARBICAN, LONDON, E.G. 



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

 Mailed abroad free. 



EUDOLPH KOElNIG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMENTS. 



TO ILLUSTRATE THE LAWS 

 AND TO PRODUCE THE PHENOMENA OF SOUND. 



PARIS, 26, RUE DE PONTOISE. 



PRICE LISTS FREE. 



NOW READY, 

 SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE 4*. ^d. POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS: 



ILLUSTRATED, CLASSIFIED DESCRIPTIVE. 



Demy 8vo, 480 pp., Illtistrated with 1,600 Woodcuts. 



Most Complete And Cheapest List of Apparatus. 



JOHN J. GRIFFIN and SONS, 22, GARRICK STREET, 

 LONDON, W.C. 



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 OflBces, and Railway Companies throughout 



Ireland. 

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

 D»es not corrode Steel Pens. Blotting-paper may be applied at the 



Is cleanly to use, and not liable toBlot. j 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. 



ENGRAVINGS AND ELECTROTYPES 



FOR SALE, at prices ranging from \s. to io.r., in good condition, ready for 

 printing. Small, medium size, and large engravings, comprising a great 

 variety of subjects, suitable for Publishers, Advertisers, and Amateurs. 

 Specimen of any subject required sent post free on application. 



FACSIMILE OF SIGNATURE for ^s. An exact copy of any name 

 guaranteed. These signatures being engraved in bold relief, are useful for 

 Stamping Books, Circulars, and Documents, or Marking Linen, and made 

 type-high for ordinary Letterpress Printing. 



Sent post free to any address on receipt of 36 stamps. ^_^ 



75, FLEET STREET, LONDON, E.G. 

 ARTISTIC. — To Ladies and Gentlemen with 



some leisure time, desiring to supplement their incomes, an opportimity 

 is offered of acquiring the ART of DRAWING and ENGRAVING 

 on WOOD in a thoroughly satisfactory and perfect styie. The terms 

 are moderate, and the hours can be made to suit the convenience of 

 pupils. Persons residing in the country can receive full instruction by ^ 

 correspondence. For further particulars call or address Mr. J. Frank- 

 lin Nash, Artist and Engraver, 7s. Fleet Street, London, E.C. 



