CXXXIV 



NATURE 



[Feb. 27, 1879 



LABORATORY, 38, GRACECHURCH STREET, LONDON, E.C. 



A. ANTHONY NESBIT, F.C.S., 



WATER ANALYST, 



Performs every description of Water Analysis on moderate terms. 



Properly cleansed bottles for the reception of samples sent to any part of 

 the Kingdom. 



CHEMICAL & PHYSICAL APPARATUS 



BOTTLES, PURE CHEMICALS, 



And every requirement for Science Classes, Private Study, or Business 

 Purposes. 



Illustrated Priced Catalogues post free for six stamps. 



Carriage allowed to any station in England or Wales, on orders of 40*. 

 value and upwards, 



MOTTERSHEAD AND CO. 



7, EXCHANGE STREET, & 10, HALF MOON STREET, 

 MANCHESTER.- 



EUDOLPH KOEiMG, 



(DR. PHIL.) 

 MANUFACTURER OF 



ACOUSTICAL INSTRUMENTS. 



TO ILLUSTRATE THE LAWS 

 AND TO PRODUCE THE PHENOMENA OF SOUND. 



PARIS, 26, RUE DE POHTOISE. 



PRICE LISTS FREE. 



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 Offices, and Railway Companies throughout 



Ireland. 

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

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



Is cleanly to use, and not Uable toBlot. i 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. 



NOW R£ADr, 

 SECOND EDITION, 



GRIFFIN'S 



CHEMICAL HANDICRAFT. 



PRICE ♦«. 7rf POST FREE. 



A CATALOGUE OF CHEMICAL APPARATUS : 



ILLUSTRATED, CLASSIFIED DESCRIPTIVK. 



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



Most Complete and Cheapest List 0/ Apparatus. 



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

 LONDON, W.C. 



HOltOWAYS OINTMENT 



A CEETAIIf 

 REMEDY 



For BAD BREASTS, OLD WOUNDS, and SORES. If 

 effectually rubbed on the Neck and Chest, it cures SOBE 

 THROATS, BRONCHITIS, COUGHS and COLDS; and for 

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



DIAMONDS AND OTHER PRECIOUS 



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

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



DIAMONDS IN MATRIX. 



R. C. NOCKOLD, Diamond and Oriental Stone Cutter and Dealer, has 

 for sale specimens of the above ; also Cut Precious Stones in all Colours. 

 12, FRITH STREET, SOHO, W. 



HOW to MAKE a TELESCOPE, a MICRO- 



SCOPE, and a MAGIC LANTERN. How to TAKE a PHOTO- 

 GRAPH and PRINT a CARTE, see ILLUSTRATED CATALOGUE, 

 now ready, 3 stamps. Containing full direction for above, and how to 

 TRANSFER LANTERN SLIDES. 



J. LANCASTER & SON, Bull Street, Birmingham. 



The LANCASTER ELECTRIC LAMP, de- 



vised by W. J. LANCASTER, F.C.S., F.R.A.S., &c., in three sizes. 

 No. I, to bum 3 hours, £2 2s.; No. 2, to bum 6 hours, £-3 3s. ; largest 

 siie, £5 5s. Set of 20 Quart Bunsen's Cells, £4 4*. Model Electric 

 Lamp and 10 Cells, £2 12s. dd. 



S. 0. TISLEY & Co. 



172, BROMPTON ROAD, S.W. 



/('lose to -South Kensington MuseumJ 



THE PHONEIDOSCOPE 



An In.<!trument for Observing the Colour-Figures of Liquid Films imder th« 



action of Sonorous Vibrations. 



Beint; a visible demonstration of the Vibratory and Molecular Motion of a 



Telephone Plate. 



The PHONEIDOSCOPE, with 3 Discs, Bottle of Solutton. D«scnpuve 



Pamphlet, &c, in C&rd'io<u-d Box, lot. td. 



HANUFACTURBD AND SOLD WH0LB8ALR AND RKTAIL BT 



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

 TELEPHONIC ELECTRICITY. AU Materials supplied for experi- 

 mental purposes 



Price Lists of Electrical and Acoustic Apparatus, with Drawings and 

 Description of the Hartnonos^raph, Post Free, 2d, 



EDWARD PATERSON, 



Electrical Engineer and Scientific Apparatus Manu/acturtr, 



3, BEDFORD COURT, COVENT GARDEN, LONDON. 



STEAM WORKS, GRAY'S INN ROAD. 



Experiments in Electric Lighting carried out. 

 Electrical Apparatus of all descriptions /or Lecture Purposes 



Loaned out. 



FOR CLASS 



DEMON- 



APPARATUS 



ST RATION 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, 20s. 



EDISON'S ELECTRIC PEN £8 8s. 

 ELECTRIC and MAGNETIC APPA- 



RATUS of all Descriptions. 

 New Illustrated Catalogue of (>o pages post free 6 stamps. 

 Orders over £i carriage paid to any part of the United Kingdom. 



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. 



