A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE 



" To the solid ground 

 Of Nature trusts the mind which builds for aye. "^Wordsworth. 



No. 1858, Vol. 72] 



THURSDAY, JUNE 8, 1905,. [PRifK One Sh!L1-inx; 



Newspaper at the Gener.al Post Office.] 



NEW PATTERN "NEWTONIAN" CHEAP 

 ELECTRIC LANTERN. 



5067 New Iron-Body Lantern, wuli brasi irom, ijitedon 



mahogany board, 4-in. double Condeni^er, best full-size achro- 

 matic Front Lens, and " Newtonian " Hand-Feed Arc Lamp. 

 Complete in Case £10 10s. 



IVE^WTO^T SZ. CO., 



OPTICIANS TO HIS MAJESTY THE KING 

 AND H R.H. THE PRINCE OF WALES AND THE QOVERNMENT, 



a FLEET STREET, LONDON. 



~ THK NEW 



"LONDON" 



MICROSCOPE. 



With Eye -piece i inch, J inch 



Object • glasses, in Mahogany 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 Focussing Substage, 14/6 extra. 



R. & J. BECK, Ltd., 



68 CORNHILL, 



THE "IDEAL" LABORATORY 

 CLAMP. 



SCIENTIFIC INSTRUMENT MAKERS, 



GRANTA WORKS, CAMBRIDGE. 



NEGRETTI & ZAMBRA'S 



ANEROID 

 BAROMETERS. 



NEW ILLUSTRATED AND 



REVISED PRICE LISTS 

 Free by Post. 



The Watch Size 

 Aneroid for foretelling 

 weather and measur- 

 ing heights. 



38 



Holborn Viaduct, 



45 CornhUl: 

 ISS Jiefienf Str 



