NA TURE 



[October 19, 1905 



Dr. J. S. HALDANE'S 



poierr a.^]:^e: Ji i» i» jv i« js. t xj s 



rOK A XA LYSIS OF MlXi: tlASES. 



(See •' The JnvestisationrJ Mine Air;' by Sir C. Le Neve Foster and 

 Dr. HaUane, 1905, p. 116.) 

 The Apparatus is arranged in a portable Mahogany Cabinet, with a rod to 

 crew into the base, so that it 

 nay be stood against the sides 

 ,( a gallery in the mine, and 

 he analysis made on the spot . 



cabinet 

 ■3 X 7i X 35 

 iches, and the 

 weight when 

 :harged ready 

 3r use is about 



ti\e pounds. 



Dr. Haldane's Mine Gas Apparatus £3 17 6 

 of the jVJ Mercury, pure, for same, 2.1b. in 



bottle 8 6 



Caustic Potash Solution, i-pint 



bottle 



"The Investigation of Mine Aii 



by Sir C. Le Neve Foster ai 



Dr. Haldane, 1905 



1 



6 



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DIFFRACTION GRATINGS, 



FOR LANTERN USE, 

 5000 Cuts to the inch - - IS O 



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THE STEREOSCOPIC COMPANY'S 



"BLOCKNOTES." 



This charming little Cimera is no larger ihin an ordinary 



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The Cameras are suppliel fitted with 



the celebrated Qoerz or Zeis.s l.enses. 



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 tSt. Martin's Street, London, W.C, and Till: .Macmillan CowfANV, Lb KMth .Avenue. New Yorl;.— THt;RSDAV, October 19 IJ05. 



