NATURE 



[May 



1905 



IMPROVED APPARATUS 



for DEMONSTRATING 



WIRELESS TELEGRAPHY. 



Especially suitable for Colleges and Scientific Institutes. 



PRICE, 



complete with 

 Oscillator, 



£7 5s. 



Full instruction 



ACTUAL IVIAKERS of X-Ray, &c., Apparatus to the Admiralty, 

 War Offlce, Colonial OfRee, Indian Government, &c., 



da ROSEBERY AVENUE, & 15-21 LAYSTALL ST., LONDON, E.C. 



Illustrated CATALOGUE(including Instructions to Beginners) Post Free. 



G. BOW RON, 



57 EDGWARE ROAD, LONDON, W., 



SECOND-HAND 



BY STANDARD MAKERS, IN PERFECT WORKING ORDER, AT 



EXTREMELY MODERATE PRICES. 



As supplied to the National Physical Laboratory ; Aberdeen, Aberystwyth, 



Birmingham, Nottingham and Glasgow Universities ; Bedford, Bradford, 



Clifton, Heriot Watt and Yorkshire Colleges ; and twenty other Scientific 



Institutions, Polytechnics, &c. 



|W Natltre says: "Teachers requiring efficient apparatus at a low 



cost for lecture or laboratory purposes, might consult the list with 



advantage." 



List on amplication by mentioning Nature. 



FREDK. JACKSON & Co. 



(Late MOTTERSHEAD & CO.), 



14 CROSS STREET, MANCHESTER 



Qoods Entrance: 10 Half-Moon Street. 



LABORATORY FURNISHERS, 



Importers, Manufacturers, and Dealers In 



chemical and physical 

 apparatus 



Of every Description. 



Fine Chemicals, Yolumetric Solutions, 

 Plain and Stoppered Bottles, 



AND EVERY LABORATORY REQUIREMENT. 



Illustrated Catalogue of Apparatus, with Prlee 



List of Chemicals, free on application. 



Telegraphic Address — " Apparatus, Manchester." 

 Telephone Number— 3238. 



a 



THE 



B.B." MICROSCOPE 



(MANUFACTURED BY THE BAUSCH & LOMB 

 OPTICAL CO.), 



As illustrated here, is specialised by us, and 

 constitutes nearly one half of our sales. It has 

 been still further improved in its mechanical 

 construction. We supply this instrument 

 complete in case, with 2/3rd and i/6th 

 Objectives, and i" Eyepiece, for 



£7 4s. lOd. 



A VISIT WOULD CONVINCE YOU 



OF ITS Superiority. 



Sole Representatives for 

 U.K. and Colonies, 



A.E.STALEY&CO., 



19 THAVIBS INN, 



HOLBORN CIRCUS, 



LONDON, E.C. 



Wrile for lllustraled 

 Microscopical Catalogue 

 (84 pa^ts), 3 Stamps 10 

 cover postage* AhoList"; ot 

 Muiotomcs, Centtt 

 fiigt s, Photogi aph I 

 Ltfius, Shiitttts and 

 Chemiiah of all dt, 

 SCI iphon s post f) c t 



W. WILSON, 



Maker of 



SPECTROSCOPES, SPECTROMETERS, 



GONIOMETERS, 



OPTICAL BENCHES, OPTICAL AND OTHER 



MEASURING INSTRUMENTS. 

 BEST WORK. MODERATE PRICES, 



Price List Free. 



1, BELMONT STREET, CHALK FARM, N.W. 



Accurate and 



Inexpensive. 



PRICE 



Descriptive 

 Pamphlet 

 Post Free. 



PIESMIC BAROMETER. 



F. jyA-ftTOIf & CO., 



CLERKENWELL OPTICAL WORKS, 



142 ST. JOHN STREET, LONDON, E.C. 



