July %\, 1879] 



NATURE 



cxr 



NO\A^ READY, 



SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE At. id. POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS; 



ILLUSTRATED, CLASSIFIED, DESCRIPTIVE. 



Demy 8vo, 4S0 pp. , Illustrated with 1,600 Wocdcuts, 



Most Complete and Cheapest List of Apparatus. 



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

 LONDON, W.C. 



W. F. STANLEY, 



Mathematical Instrument Manufacturer 



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

 Department, Admiralty, &c. 



Mathematical, Drawing, and Surveying In«;tnaments of every description, oi 

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



Price List fost free. Engine Divider to the Trade, 

 ADDRESS- 

 GREAT TURNSTILE, HOLBORN, LONDON, W.C. 



3. 0. TISLEY cfe Co 



OPTICIANS, '■' 

 172, BROMPTON ROAD, S.W. 



(Close to South Kensington Museum). 



THE PHONEIDOSCOPE 



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

 action of Sonorous Vibrations, 



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

 Telephone Plate. 



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

 Pamphlet, &c-, in Cardboard Box, lof. (>d. 



MANUFACTURED AND SOLD WHOLESALE AND RETAIL BY 



S. C. TISLEV & CO., 17a. BROMPTON ROAD, LONDON, S.W. 



TELEPHONIC ELECTRICITY. All Materials suppUed for experi- 

 mental purposes. 



Price Lists of Electrical and Acoustic AffaratuSy with Dt/iwings and 

 Description of the Namtono^afh^ Post Free, td. 



DRAPER'S INK (DIOHROIC). 



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 Offices, and Railway Companies throughout 



Ireland. 

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

 Docs not corrode Steel Pens. Blotting-paper may be applied at the 



Jscleanly to use, and not liable toBIot. 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. At;sTlN & Co., Duke 

 Street, Liverpool ; and Stacy & Cook, Paternoster Row ; and to be had of 

 all Stationers. 



BEWLEY & DRAPER (Limited), Dublin. 



NOTICE OF REMOVAL. 



A CERTAIN 

 EEMEDY 

 and SOKES. If 



For BAD BEEAST8, OLD WOUNDS, 

 effectually nibbed on the Keck and Chett, it cures SOBS 

 IHSOATS, BRONCHITIS, COUGHS and COLDS; and for 

 GOOl'. BHEUMAT Igg, aid all Skia SUeates it ia oneqnaUed. 



Extra fcap. 8vo, js. 6ei. 



METALS and their CHIEF INDUSTRIAL 



APPLICATIONS. By C. ALDER WRIGHT, D.Sc, Ucturer o« 

 Chemistry m St. Mary's Hospital Medical School. With Illustraticiu. 

 MACMILLAN & CO., London. 



JAMES HOW & CO., 



SCIENTIFIC INSTRUMENT MAKERS, 

 73, FARRINGDON ST., LONDON 



(I..ATE OF 5, St. Bkide St., and 2, Fostes Lane). 



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

 Rock Sections and other Obiects for the Microscope. 



The LANCASTER POCKET CAMERA 



for plates 4J X 3J inch, having three double dry-plate SHde5, Umbrella 

 Stand, best Lens with plate of Diaphragms, &c., &c., £,S' Particulars 



The'LANCASTER CARTE PHOTOGRA- 

 PHIC APPARATUS, with Chemicals, &c., &c., complete, 1% w. 

 FIRST QUALITY ASTRONOMICAL TELESCOPES with Object 

 Lenses, by Wbay, 2l-inch, ^5 os. \ aj-inch, £,^ loj. ; 25-inch, >^io ; 

 3.inch, ;^i2 loj. ; sJ-inch, /1515J'. ; 4-inch, ^i^\ 4j-inch, £,^o\ 

 5-inch, jCss. &c. Capital Student's Microscope, £,-^ 3J. Collegian's 

 First Quality Microscope, £,f^ ^s. Illustrated Catalogue, 3 Stamps. 

 J. LANCASTER & SON", Opticians Birmingham. 



NEW ILLUSTRATED CATALOGUE of ELECTRIC 



SIGNALS, &c., with Instructions for Fixing. 150 Diagrams. Justout, 

 post free, 6 Stamps. 



EDWARD PATERSON, 



Electrical Engineer and Scientific Apparatus Manufacturer, 



3, BEDFORD COURT, COVENT GARDEN, LONDON 



STEAM WORKS, GR.4Y'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. 

 SIE.MEN'S and GRAMME'S DYN.\MO 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. 

 EDISON'S ELECTRIC PEN 1% Si. 



ELECTRIC and MAGNETIC APPARATUS of all Descriptions. 

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

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



BARCLAY & SON, 



138, REGENT STREET, LONDON. 

 To Her Majesty and H.R.H. the Prince of 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. 



