...unhatched during nearly four years and a half, or four years longer than is their wont, and this suggests the significant question : How much longer could the...together, Mr. Riley concludes that we are, as yet, unable to offer any very satisfactory explanation, based on experiment, of the causes which induce...

...their wont. This suggests the significant question : how much longer the eggs of this species could under favoring conditions of dryness and reduced temperature,...power of hatching. Putting all the facts together, Prof. Riley concludes that we are yet unable to offer any satisfactory explanation of the causes which...

...unhatched during nearly four years and a half, or four years longer than is their wont, and this suggests the significant question : How much longer could the...accelerates growth, while a falling temperature retards and torpifies, and experiments recorded by the author1 show that such is the case with regard to the eggs...

...unhatched during nearly four years and a half, or four years longer than is their wont, and this suggests the significant question : How much longer could the...exceptional retardation in development among insects. It ia a very general rule that a rising temperature simulates and accelerates growth, while a falling...

...their wont. This suggests the significant question : how much longer the eggs of this species could, under favoring conditions of dryness and reduced temperature, retain their vitality and power of hatching 1 Putting all the facts together, Prof. Riley concludes that we are yet unable to offer any satisfactory...