CXXVl 



NATURE 



{Feb. 20, 1879 



JAMES WOOLLEY, SONS, & CO., 



69, MARKET STREET, MANCHESTER. 



CHEMICAL APPARATUS AND REAGENTS 



For Lecture and Class Demonstration, Laboratory Instruction, &c. 

 SETS OF APPARATUS AND CHEMICALS 



For the various Public Examinations. 



Portable Chemical Cabinets adapted for private study. 



Price Lists on Application. 



MICROSCOPES, OBJECTIVES, &c. 



CENTENNIAL EXHIBITION, PHILADELPHIA, U.S.A- 



Th« Medal and Highest Award has been given for Design, 

 <^onstruction, 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. 



EDWARD PATERSON, 



Electrical Engineer and Sciefitific 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 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, 20^. 



EDISON'S ELECTRIC PEN £8 8s. 

 ELECTRIC and MAGNETIC APPA- 



RATUS of all Descriptions. 

 New Illustrated Catalogue of 60 pages post free 6 stamps. 

 Orders over £a ourriage paid to any part of the United Kingdom. 



HOBNE'S FOMFEIAN DECORATIONS. 



ROBERT HORNE, 



HOUSE DECORATOR and PAPER-HANGING 



MANUFACTURER, 



41, GRACECHURCH STREET, LONDON, E.C. 



By Special Appointment to His Majesty the King of Italy. 



MICROSCOPIC OBJECTS. 



Horn Sections, Blood Discs, Feathers, Hairs, Sections of Bone and Teeth, 

 Fish Scales, Anatomical Preparations from the Human Subject and Lower 

 Animals, Palates of MoUusca, Sections of Shells and Pearls, Polyzoa, whole 

 Insects, Parasites, parts of Insects, Ossicula, Spines, &c., of Echinoder- 

 mata, Spicules of Sponges and Gorgonias, Foraminifera, Botanical Prepara- 

 tions, Diatomacese, Salts, Crystils, Sections ef Rocks, Fossils, Minerals, 

 &c. 



Ochreous Iron in Moss-like Forms in Calcite, 1*. 6d. post-free. 



Stellar Mica, or Canadian Phlogoplte, is. yi. post-free. 



Oitalogues free. 



THOS. D. RUSSELL, 



48, ESSEX STREET, STRAND, LONDON, W.C. 



FLETCHER'S 

 PERFECTED GAS FURNACE 



The simplest and cheapest of all, both 

 n first cost and in use. Will work with 

 any gas supply 

 from 10 to 100 

 feet per hour, 

 and will fuse 

 with ease sub- air 

 stances infusi- 

 ble in any 

 known furnace. 



Prices from 



13s. 6d. 



Fletcher's New Patent Blowpipe & Perfected Mouthpiece. 



Complete 

 Illustrated 



List on 

 Application. 



THOS. FLETCHER, Museum Street, Warrington. 



NONA/' READY, 



SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE 4J. ^d. POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS: 



ILLUSTRATED, CLASSIFIED DESCRIPTIVE. 



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



Most Complete dnd Cheapest List of Apparatus. 



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

 LONDON, W.C. 



FRY'S 



GOLD MEDAL, 

 PARIS EXHIBITION. 



COCOA 



In Packets and Tins. ' Pure 

 Cocoa only, with the super- 

 fluous oil extracted. 



EXTRACT 



" If properly prepared, there is no nicer 

 or more wholesome preparation of 

 cocoa." — Food, Water, and Air, 

 edited hy Dr. Hassall. 



J. S. FRY & SONS, Bristol and London. 



THE MINIATURE MICROSCOPE LAMP 



(REGISTERED) 

 PRICE 14*. PORTABLE TIN CASE FOR DITTO, m. W. 



JAMES HOW & Co., 



SCIENTIFIC INSTRUMENT MAKERS, ^ 



S, ST. BRIDE ST. {late 2, Foster Lane\ LONDON. 



