M. R. Bunsen on the Law of Absorption of Gases. 185 



the required coefficient c for air and water from the following 

 equation : — 



V n = 



which give 



aPOV! 

 O76(N + 0) J 



_ J 5PNV L _ 



0-76(N + O) ' 



c=0-2096a + 0-7904/9. 

 The following table is calculated by the aid of this formula :— 



Fig. 5 (Plate I.) gives a graphic representation of the solubility 

 in water of some of the gases examined. 



The following absorption-coefficients of chlorine, sulphurous 

 acid, and sulphuretted hydrogen, were not determined in the 

 absorptiometer, but by chemical methods, which will be fully 

 explained by Dr. Schonfield in his research upon this subject. 



The coefficients of absorption of a number of gases having 

 been thus obtained, we arc enabled to verify experimentally the 

 formulae which were deduced from Dalton's hypothesis. 



If a volume of a simple gas, whose absorption-coefficient is «, 



