188 Mk. Na1>ier oil the Effects of inhaling Cyanide Fumes. 



Sesquioxides. 



Water. Oxygen. 



Braunite, 691 12-94 



New Brunswick, 904 10-18 



TABLE III. 

 Mean of all Experiments. 



BiNOXIDES. 



Oxygen. Chlorine. Binoxidc. 



Geissen, 17-79 78-93 97-84 



KUpatrick, 1719 76-27 94-54 



Thuringia, 14-44 64-07 7942 



New Zealand, 1402 62-20 77-11 



Table Mountain, 11-39 50-53 62-64 



Sesqtjioxides. 



Equivalent to 

 Oxygen. * Chlorine. Binoxide. 



Braunite, 12-94 57-32 71-17 



New Brunswick, 1018 45-16 55-99 



The column headed Chlorine gives the relative value of the oxides for 

 the preparation of bleaching powder, and is obtained by multiplying 

 the oxygen column by 4-437, the atomic weight of chlorine. 



2d April, 1851. — The Vice-President in the Chair. 



Messrs, David Tainsh and Paul Cameron, were admitted members. 



The following papers were read : — 



" Notice of Liebig's new method of Analysing Common Air." By Mr. 

 R. M. Murray. 



" Notice of a pure form of Sesquioxide of Chromium and on Sesqui- 

 chromate of Potash." By Dr. R. D. Thomson. 



XXIII. — Th£ Effects on Health of inlialincj the Fumes of Cyanide of 

 Potassium Solutions. By James Napier, Esq. 



I believe it is a fact well known in medical practice, that different 

 trades and occupations give rise to distinct kinds or forms of disease. I 

 was told a few years ago by an eminent physician, that so much does the 

 modification of disease depend upon the influence of our occupation, that 

 in some trades, such as that of a printer, a change of colour continued in 

 for a length of time will give a distinct form of disease ; and that much 

 diflSculty is experienced in the medical profession by the paucity of 

 observations upon the causes which influence these modifications. It may 



