^OS.^-L /f^lf 



A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE. 



To the solid ^oitud 



LANTERN SLIDES 



IN NATURAL COLOURS. 



A fe'w Subjects can now be supplied as 

 Lantern Slides for showing in an ordinat^y 

 single Lantern, illustrating Photography 

 in Colours. They are composed of three 

 superposed films, the negatives of which 

 have been taken through Red, Green and 

 Blue Glasses. The colours and tints are 

 exquisite, and show most brilliantly on 

 the screen, making very effective pictures. 

 Price 20s. each. 



No apparatus is needed to show them except an 

 ordinary Optical Lantern. 



NEWTON & CO., 



Scientific Instrument IVlakers to H.M. the Queen 



and the Government, 



3^LEET STREET, LONDON, E.C^ 



B I3 



NEW 



MICROSCOPE 



THE 



"BRITISH STUDENTS." 



Microscope Stand No. 55, as 

 figured, -with Iris Diaphragm, 

 One Eye-piece; Double Nose- 

 piece, Two Object-glasses, 2/3" 

 and 1/6", adjusted to be in 

 about focus, and the whole 

 packed in polished Mahogany 

 Case, 



£6:8:6 



BROWNING'S 

 "PANERGETIC" BINOCULAR 



OPERA. FIELD AND MARINE GLASS. 



Has 12 Lenses, gives a very large field of view, and 



exhibits objects \N\Vn remarkable brightness 



and clearness. 



The " Panergetic " is 

 the best Binocular, for 

 general use, made ; only 

 its price has prevented it 

 from being more widely 

 known and used. Now it 

 is reduced nearly half in 

 price. The medium size 

 in Black Enamel being 

 £2 5s., and in Alum- 

 inium ,£3, in best Cases 

 complete. 



FULL PA/^TICULARS BY POST. 



JOHI[ BROWNINC, 63 STRAND, LONDON, WX. 



NEGRETTI & ZAMBRA'S 



IMPROVED 



68 CORNHILL, LONDON, E.C. 



SELF-RECORDING 



RAIN GAUGE. 



DESCRIPTIVE 



PRICE LIST 



POST FREE. 



INVENTED AND MADE ONLY liV 



NEGRETTI & ZAMBRA, 



Scientific Instrument Makers to Her Majesty the Queen, 

 38 HOLBORN VIADUCT, E.C. 



Branches— 45 Cornhill, E.G., and 122 Regent Street, W. 



