248 POPULAR SCIENCE MONTHLY. 



ceases and the entire range of chemical and physical activities with 

 which we are acquainted either cease, or, it may be, assume an entirely 

 new role. This temperature again is iar below that at which any 

 chemical reaction is known to take place. The fact, then, that life 

 can continue to exist under such conditions affords new ground for 

 reflection as to whether after all life is dependent for its continuance 

 on chemical reactions. We, as biologists, therefore follow with the 

 keenest interest Professor Dewar's heroic attempts to reach the absolute 

 zero of temperature; meanwhile, his success has already led us to re- 

 consider many of the main issues of the problem. And by having af- 

 forded us a new realm in which to experiment, Professor Dewar has 

 placed in our hands an agent of investigation from the effective use of 

 which we who are working at the subject at least hope to gain a little 

 further insight into the great mystery of life itself. 



