354 Dr. H. M. Vernon. The Effect of Stateness of tJie 



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The probable reason of this increase readily suggests itself. Thus 

 supposing that animals developing from ova which are very nearly, but 

 not quite stale enough to avoid normal fertilisation and development, 

 are for that reason less strong and vigorous than those arising from 

 fresh sex cells, it follows that the period during which the sex cells 

 remain normal ought to be as long as possible, but that, once these have 

 begun to deteriorate, they ought to absolutely lose their functional 

 capacity as rapidly as possible, in order that the number of enfeebled 

 organisms which Ave have supposed to arise may be as small 

 can be. 



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