1 >,. A. D. Waller. On, the Physical [May 5, 



In the ^^"^ the apparatus consisted of (1) a distilling 



fljk (containing the fluid to be evacuated, and a known weight of 



Sorofonn in 7m* fr bulb), (2) a receiver, and (3) a Geryk air- 



is 



e receiver is first evacuated while shut off from the distiller. It 

 s then shut off from the pump, and placed in connection with the 

 distilling flask, with the result that the liquid in the latter boils and 

 gives up its dissolved gases, which are for the most part drawn over 



into the receiver. 



The evacuation of CHC1 3 is completed (in the case of saline; it is not 

 completed in the case of blood) by gentle heat, and by opening the 

 inlet of the distilling flask so that a rush of air takes place through the 

 distiller to the receiver. The inlet tube is drawn out to a fine point, 

 and reaches to the bottom of the distilling flask ; the outlet tube is 

 provided with a froth-bulb. Finally the quantity of CHC1 3 in the 

 receiver is estimated by Harcourt's method. 



In A first trial of this experiment with water in the distilling flask the 

 result was as follows : 



Weight of CHCls taken ............ 0-082 gramme 



recovered ......... 0'065 



Deficit ..................... 0-017 



or 21 per 100. 



This considerable deficit was attributable to an insufficient capacity 

 of the receiver as compared with that of the distiller and froth-bulb. 

 That this was the case is shown by the figures of a second trial, in 

 which a larger receiver was taken (of 1332 c.c. capacity in place of 

 400 c.c. capacity in the previous trial). 



In this seamd trial the figures came out : 



Weight of CHCls taken ............ 0-112 gramme 



recovered ......... 0-109 



Deficit 0-003 



or 3 per 100. 



The similar experiment, with blood in place of water, gave a very 

 different result, the deficit of evacuation being much greater, and 

 clearly signifying that the chloroform is not merely in solution, but 

 held in combination. In a carefully conducted trial made with 50 c.c. 

 of whipped bullock's blood, to which 0-108 gramme of CHC1 3 had 

 been added, the weight recovered was only O'OU gramme ; i.e., the 

 deficit was 0'092 gramme, or 85 per cent. It is evident, therefrom, 

 that the absorption of chloroform by blood does not follow Henry's 

 law. J 



