A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



" To the solid grotind 

 Of Nature trusts the mind which builds for aye." — WORDSWORTH. 



NEWTON & CO.'S 



PATENT 



" DEMONSTRATOR'S " LANTERN, 



FOR LIMELIGHT OR ELECTRIC. 



With Prism for Erecting, 

 and forVertical Projection. 



Pkice £10 10s. 



3 FLEET ST., 

 LONDON. 



ij The most simple 

 1; and efReient 



;i Single Lantern 



'1 yet constructed 

 ■i for general 



■f scientific work. 



\ THIS SEASON'S 

 •i CATALOCUE OF 

 j SLIDES, &c , 

 POST FREE. 



THE NEVV^ 



"LONDON" 



MICROSCOPE. 



With Eye -piece | inch, J inch 



Object - glasses, in Mahc^any 



Case, 



£5 12s. 6d. 



Double Nose-piece, 9/- extra. 

 Focussing Substage, 14/6 extra. 



R. & J. BECK, Ltd., 



68 CORNHILL, 



This Universal Lantern 

 has been devised for the 

 projection of experiments 

 and slides either horizontally 

 ically ; it can easily 

 be adapted for use as a 

 Lantern Microscope. The 



board is made to fold 

 so that the Lantern can be 

 packed into a box i8J x 3^ 



REYNOLDS & BRANSON, Ltd., 

 Estimates ani,] t. 'JEX T^ I> S . ICatalogue'^ Free. 



NEGRETTI &. ZAMBRA'S 



SELF-RECORDING 



METEOROLOGICAL INSTRUMENTS. 



THE THERMOGRAPH, for Outdoor or Indoor Observation. 



Accurate Thermometers for all purposes. 

 Illustrated Price Li sts free by Post to all p arts of the world. 



N E G R ETTI & ZAM BRA, 

 38 HOLBORN VIADUCT, E.G. 



Branches — 45 Cornhili,, and 122 Regent Street. 



AWARDED TWO GOLD MEDALS PARIS ^,EXH1B1T10N 19C0. 



11 FFR « tono^l 



