J tine 5, 1879 



NATURE 



xlvii 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE 141. PORTABLE TIN CASE FOR DITTO, m. W. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, 



S. ST. BRIDE ST. (late 1, Foster Latu), LONDON. 



EUDOLPH KOENIG, 



(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. 



W. LADD & CO., 



Scientific Instmment Mannfactorers 



[By Appdntvnent to tfu Royal Initiiution of Great Britain)^ 



II & 12, BEAK STREET, REGENT STREET, W. 



BYRNE'S PATENT COMPOUND PLATE PNEU- 

 MATIC BATTERY for Cautery and general purposes. 



EDMUNDS' PHONOSCOPE for making Vocal Vibra- 

 tions visible in a Vacuum Tube. 



HUGHES' MICROPHONE. 



TELEPHONIC APPARATUS, «c. 



LADD'S IMPROVED SELF CHARGING HOLTZ 

 ELECTRICAL MACHINE, with 4 to 12 Plates, in- 

 closed in a Mahogany and Glass Case. This instmment is 

 immediately available in any condition of the atmosphere. 

 Philosophical Apparatus of every Description. 



Illustrated CatalogM, Sixpe*ue. 



ENGRAVINGS AND ELECTROTYPES 



FOR SALE, at prices ranyinu from ix. to loi., in good condition, ready for 

 printinK. Small, medium siie, 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 3*. An exact copy of any name 



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

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

 lype-high fur ordinary Letterpress Printing. 

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



75, FLEET STREET, LONDON, E.C. 

 ARTISTIC— To Ladies and Gentlemen with 



S'jine leisure time, desiring to luiiplement their incomei, an opportunity 

 iscffered of acquiring the ART of DRAWING and ENGRAVING 

 un WOOD in a thorrjughly satisfactory and perfect ilyie. The terrai 

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

 pupils. Ferseni residing in the country can receive full instructioa by 

 correspondence. For further particulars call or address Mr. J. FfaM c- 

 LIN Nash, Artist and Engraver, 75. Fleet Street, Londan, E.C. 



GARDENING ILLUSTRATED: a new 



Weekly Journal for all interested in Gardening in Town or Country. 

 Price \d weekly. Profusely Illustraled. Flowers, Fruits, Vegelables, 

 T.wn an.l Suburban Gardening, Villa Gardening, the Cotuge Garden, 

 Window Gardening, Work in the Garden for every week. May be had 

 of all Newsagents and at the H->ok-ttaIls, \d. every Saturday. Po« free 

 for twelve months fur 6j (xt. Specimen copy, ijrf. in SUmps Office, 

 37, Sou Hampton Street, CoventGarden. London, W.C. 



HORNE'S POMPEIAN DECORATIONS. 

 ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.C. 



By Special Appointment to His Majesty the King ef Italy. 



BARCLAY & SON, 



138, REGENT STREET, LONDON. 

 7> Her Majesty and H.K.H. the Prince #/ Wales. 



DUPLEX LAMPS. 

 MODERATOR LAMPS. 



READING LAMPS. 



MICROSCOPE LAMPS. 



BEST COLZA OIL. 



A I KEROSINE OIL. 



WAX, SPERM, 



AND 



PARAFFINE CANDLES. 



ILLUSTRATED CATALOGUES POST FREE. 



OPTICIANS, 

 17 a, 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 Cardboard Box, loj. f>d. 



MANUFACTURED AND SOLD WHOLRSALB AND XBTAIL BV 



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



TELEPHONIC ELECTRICIIY. All Materials supplied for experi- 

 mental purposes. 



Price Lists of EUctrical and Acoustic Apparatus^ with Dfomntt mtut 

 Description of the Hartnono^apk^ Post Free, %d. 



HOllOWAYS OINTMENT 



A CERTAIN 

 REMEDY 



For BAD BEEASTS, OLD WOUNDS, and SORES. If 

 effectually rubbed on the Neck and Chett, it cures SOBE 

 IHBOATS, BRONCHITIS, COUGHS and COLDS; and for 

 GOirr, BHXUMATISH, aid all Skin Diseases it is unequalled. 



The MORPHOLOGY of the SKULL. By 



W. K. PARKER. F.R.S., Hunterian Professor, Royal Colleje of 

 Surgeons, and G. T. BEITANY, B.Sc, Lecturer on Botany in Guy's. 

 Hospital Medical School. Illustrated. Crown 8vo. las. 6d. 



MAC.MILLAX ft CO., London. 



