NOMOS. 191 



nature, then, under certain circumstances, argument 



heat becomes a necessary effect of law. O r the ilb 



As we said before, it is law attested by a [atof nature. 



particular class of nerves. Nay, it is A possible 

 even possible to find some reason why the 

 rays of the sun are attended with sensible 



heat, and not the rays of the moon. We the sun > and 



J none in the 



have already said that the degree of rays of the 

 heat connected with electrical currents is 

 directly proportionate to the inadequacy of the con- 

 ductor. An ordinary current may be passed through 

 a thick wire without producing any evident sign of 

 heat, but, if it is passed from this wire into a thin 

 wire, the thin wire immediately becomes heated ; and, 

 on the contrary, the current which heated a thin wire 

 will lose all signs of heat when it is passed from this 

 wire into a thick wire. Is it possible, then, that these 

 facts should have any bearing upon the question under 

 consideration? Is it possible that the sun's rays 

 should feel hot because they proceed from a larger to 

 a smaller body ? Is it possible that the moon's rays 

 should fail to produce any impression of heat because 

 they proceed from a small to a larger body ? 



