HARRIS: OVULES AND SEEDS IN CERCIS 549 
observed seem to me, in view of the numerous difficulties of the 
problem, premature. Upon the painstaking collections of facts 
in regard to natural phenomena, whether or not they can be 
lined up with current theories, seems to me to rest the real advance 
of biology. When more comprehensive data are available—many 
of which are already collected and in an advanced stage of reduc- 
tion—it will be much safer to consider causal phases of the phe- 
nomena. 
CoLp SPRING HARBOR 
