NA TURE 



[June 29, 1905 



Dr. J. S. HALDANE'S 



poisrr A]BXi£: appaisa'X'us 



FOR ANALYSIS OF MINE GASES. 



(S,e " '/■//<• [micstlsation of Mine Air" l,y Sir C. Le Neve Foster ami 



Dr. Ilaldane, 1905, /. 116.) 



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



rew into the base, so that it 



;iy be stood against the sides 



a gallery in the mine, and 



alysis made on the spot. 



softhf 

 cabinet are 

 13 X 74 X 3* 

 inches, and the 



weight when 



charged ready 



for use is about 



five pounds. 



Dr. Haldane's Mine Gas Apparatus 

 Mercury, pure, for same, 2-lb. in 



bottle 



Caustic Potash Solution, i-pint in 



bottle 



"The Investigation of Mine Air," 



by Sir C. Le Neve Foster and 



Dr. Haldane, igos 



Sole N|aKers: C. E. MULLER, ORME & CO., Ltd., 

 148 HIGH HOLBORN, LONDON, W.C. 



THE 



WOODHOUSE 

 INCLINED PLANE. 



Price 2S/- 



TOWNSON & MERCER, 



34 CAMOMILE STREET, E.C. 



:r^ji.i>xxjivi: 



ORIGINAL 



A few Milligrams of the 



HIGH ACTIVITY 



RADIUM BROMIDE 



for Sale. 



ISENTM AI. Sl CO., 85 MORTIMER STREET, LONDON, W. 



Contractors to the Admiralty, War, India, and Colonial Offices, &c. 



THE LONDON STEREOSCOPIC COOlPflNY'S 



LATEST INTRODUCTION 



Cbe "Jirtlst" Reflex Camera 



For Day-Light Loading Flat Films or Plates. 



The Ideal Camera for Photograptiing Figure Slmlie.';, Animals, Natural History 



Subjects, Architecture, Landscapes, &c. 



The picture can be viewed the full size and focussed right up to the moment 



of exposure. 



Write for Fully IHustrated Booklet (N) Free from 



108 & 108 REGENT ST., W., or 54 CHEAPSIDE. 



ited by Richard t_LAV and Sons, Limited, at 7 & 8 Bread Street Hill, Queen Victoria Street, in the City of London, and published by Macmii.l/ 

 AND Co., Limited, at St. Martin's Street, London, W.C, and The Macmillan Company, 66 (■'ifth Avenue, New Yorl<.— Thursday, June =9 1903. 



