COLD. 



Its Relations with the So-called Phys- 

 ical Forces. 



BY HENRY RAYMOND ROGERS, M. D. 



That cold is simply "the absence of 

 heat" is apparently unquestioned by the 

 scientific world. Physical Science con- 

 sequently gives it no position as a pos- 

 itive force. Yet the manifestations of 

 the power of cold are many, and plain ; 

 taking on forms of exquisite delicacy, as 

 well as of stupendous magnitude and 

 power. It has, moreover, as distinctive 

 operations, and as clearly defined laws. 

 Cold should therefore take rank with 

 light, heat, electricity, magnetism, grav- 

 ity, etc. The recognition of this force 

 must introduce great light into science 

 in many of its branches. 



The powers of cold are unquestioned. 

 The almost fabulous polar ice-fields 

 show its might, and the delicate fern- 

 like frost pictures upon our window- 

 panes, attest the presence of a real force. 



To compare it with heat it is not less 

 active. Heat expands, cold contracts ; 



