o . S' 



A WEEKLY ILLLSTRAiKD JOURNAL Ul-" SCIENCE. 



THE ■■NEWTONIAN" 



UNIVERSAL SCIENCE LANTERN 



Oomplete foi- Slides, Microscopic Objects, and Spectra. 



Price £18. 



For Lecturers on Light, Colour, and Colour PhotOKraphy, &c. 



Sole Makers: NEWTON & CO.. 3 FLEET STREET, LONDON. 



CORNHILL, 

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BROWNING'S SPECTROSCOPES. 



THE MINIATURE SPECTKOSCOrE. 

 This inslriimcnt will show many of Fiiiunhofer'.s lines, the 

 liri|,'lu lines of the mclals an<l ^nscs, and the alisorplion bands in 

 coloured nases, crystals, or liquids. 



Price, with Plain Slit, £i is. ; dilto, with Adjustable Slit in 

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 in Morocco Case, £2 6s. 



Illustrated Catalo,i,'iie of Spectroscopes, Post Free. 



JOHN BROWN I NG, 



MANUFACTURING OPTICIAN, 



63 STRAND, LONDON, W.C. 



THE TOURISTS ANEROID. 



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For Measuring Altitudes wilhuul Calculation. 



NkW h.l.l.STKATIti. I'KICK I.ISIS H(KB HV I'OST. 



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IJOO luiKraviliKS, Price 5*. 6</. 



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