202 



W. E. ALLEN. 



remembered .that all except the muscle are so generalized in thru 

 original condition that they require little change before reaching 

 the original limit of differentiation. On the other hand, the 

 muscle is rather highly specialized and if it be taken as a standard 

 .1 rather marked correlation is noted. It is just becoming dis- 

 tinguishable at the sixth day when growth has its greatest speed 

 according to this polygon, and it gradually takes on maturity 

 until it is well developed by the ninth day which is evidently 



Chart 11. 



Temperature. 



15 



Cfrowth Incite. 



Sections 



Toto 



B 



10 



12 13 



IS 16 



(.'hurt II. Tempi-ratlin- i C. t<> i JM inrh rise. Growth rate - M.I nun. to 

 !0 inch rise. 



somewhat past the time- of most rapid extension. A -lance at 

 the chart indicates the probability of greatest speed having 

 been -ho\\ n at about the seventh or eighth day if the temperature 

 had been under control. 



Chart II. is a polygon constructed from micrometer measure- 

 ments under the compound microscope, of the tissues in toto 



