244 Prof. S. Arrhenius on the Influence of Carbonic Acid 



In this table the angle of deviation is taken as head-title. 

 After K and W stand the quantities of carbonic acid and 

 water-vapour traversed by the ray in the above-mentioned 

 units. Under this comes after i obs. the intensity of radiation 

 (reduced) observed by Langley on the bolometer, and after 

 this the corresponding value i calc, calculated by means of the 

 absorption-coefficients given in Table II. below. G is the 

 " weight" given to the corresponding i obs. in the calculation, 

 using the method of least squares. 



For the absorption-coefficients, calculated in this manner, 

 I give the following table. (The common logarithms of the 

 absorption-coefficients are tabulated.) 



Table II. — Absorption- Coefficients of Carbonic Acid (a?) 

 and Aqueous Vapour (?/). 



Angle of Deviation. 



log X. 



logy. 



A. 



O 



40 



J +0-0286 

 1 00000 



-0-1506 I 

 -0-1455/ 



27-2 



39-45 



-0-0296 



-0-1105 



34-5 



39-30 



-0-0559 



-0-0952 



29-6 



39-15 



-01070 



-0-0862 



26-4 



39-0 



-0-3412 



-00068 



27-5 



38-45 



-0-2035 



-0-3114 



24-5 



38-30 



-0-2438 



-0-2362 



13-5 



3815 



-0-3760 



-01933 



21-4 



380 



-0-1877 



-0-3198 



44-4 



37-45 



-00931 



-0-1576 



59-0 



37-30 



-0-0280 



-0-1661 



700 



3715 



-0-0416 



-0-2036 



75-5 



37-0 



-0-2067 



-0-0484 



62-9 



36-45 



f -0-2465 

 1 -0-2466 



+0-00081 



-o-oooo } 



56-4 



36-30 



-0-2571 



-0-0507' 



51-4 



36-15 



J -0-1708 

 1 -0-1652 



+0-0065 1 

 -0-0000 J 



39-1 



360 



-0-0940 



-0-1184 



379 



35-45 



-0-1992 



-0-0628 



36-3 



3530 



-01742 



-0-1408 



32-7 



35-15 



—0-0188 



-0-1817 



29-8 



35-0 



-00891 



-0-1444 



21- 9 



The signification of these figures may be illustrated by an 

 example. If a ray of heat, corresponding to the angle of 

 deviation 39°*45, passes through the unit of carbonic acid, it de- 



