THE HAMILTON ASSOCIATION. 107 
Everything, in fact, seems to tell us that we are safe in judging 
of the whole from the part within our reach, so that we are 
quite within reason in believing that life, wherever found, will 
be similar to and require similar conditions to life on earth. 
Thus my reasoning as to the nature of organic life on the 
Moon stands justified. 
Finally, let me say that there does not seem to be any more 
interesting lunar study than the investigation of the evidence of 
lunar change. If others follow in Prof. Pickering’s steps it 
will not be long before we will be able to sav more definitely 
and clearly than we can now that the Moon is not a dead world. 
