ORIGIN OF LIFE, SEX, SPECIES, ETC. 223 



unfamiliar with the present status of the sciences 

 of biology and histology should inquire: How is it 

 possible that this substance can be expended in 

 each generation in building up the body of that 

 generation, and yet enough remain over to pass on 

 to the next, and then build up the body of that, 

 and so on in an unending series ? Then it must be 

 explained that not all of the reproductive material 

 which is passed over in the form of the fertilized 

 ovarian cell to the new organism in making is con- 

 sumed in this making, but a small portion of it 

 is segregated and reserved by one of the earliest 

 segmentations which occur in the pre -embryonic 

 development of the new individual. That the 

 segregated portion grows in the body of the new 

 individual by assimilation, and multiplies by caryo- 

 kinesis fission, etc., seems to be established almost 

 beyond doubt, by the experiments of prominent 

 biologists. Such a process repeated in each genera- 

 tion, is competent to maintain a sufficiency of this 

 important material ad infinitum. There can be no 

 doubt that the fertilized ovarian cell, minus the 

 segregated portion, is responsible for the general 

 nature of the new individual, but it is probable that 

 the segregated part determines sex. See note at 

 end of book. 



From the fact that a part of the reproductive 

 substance passes from generation to generation 

 unchanged, practically forever, and from the further 

 fact that the portion assimilated in each generation 



