AND ANIMAL LIFE. 53 



degrees less than that of either of the other two, 

 while at the same time the thermometer in the 

 rectum of this had fallen only to the extent of 

 the first in the same situation, and 1| less than 

 that of the second. 



Having, from these and similar experiments^ 

 arrived at conclusions unfavourable to those 

 proposed by Mr BRODIE, I instituted a variety 

 of others, which seemed to me calculated to 

 strengthen either the opinion entertained by 

 myself, or that adopted by this physiologist. If 

 the generation of animal heat belong rather to 

 the nervous than sanguiferous system, and if 

 galvanism be capable of performing the func- 

 tions of the former, as imagined by WILSON 

 PHILIP, the employment of this powerful agent 

 ought to be regarded as an additional means to 

 promote the generation of the principle. A 

 valuable discovery of my talented friend, Mr 

 Kemp, allowed me to make a trial without 

 the least inconvenience. The discovery to which 

 I allude is the possibility of keeping up a conti- 

 nuous stream of galvanism without the accom- 

 paniment of the shock. Unless befriended by 

 such means, it is almost impossible to apply a 

 strong galvanic power to purposes of this kind. Mr 

 Kemp kindly assisted me in the first experiment. 

 Two troughs, each of 50 two-and-a-half inch 

 plates, were used on the occasion. After these 

 were charged and connected, the positive wire 



