)/^ 



I/Ps. 



'"^^ ^^ well, 



^^^^^- The,: 



r^£ BEGINNINGS OF LIFE. 



97 



but recently come into being i. After a careful sum- 

 mary of what is known on the subject, 



Mr 



in s 



take 



racial 



n as a 



■ similar 



pljj, says: — ^The assumption to which we seem driven by 

 the ensemble of the evidence is, that sperm-cells and 



4 



germ-cells are essentially nothing more than vehicles 

 in which are contained small groups of the physio- 



l 



parts 



Mcx so do til ^Qg^*^^^ units in a fit state for obeying their proclivity 

 ;he parent towards the structural arrangement of the species they 



belong to Thus, the phenomena of Heredity 



are seen to assimilate with other phenomena j and 

 the assumption which these phenomena thrust on us 

 appears to be equally thrust on us by the phenomena 



which enables 



■ow 



into plait 



Hered 



We 



lich are even!: 

 5 changed. \ 



- parts— each: ^ny organism to either parent is conveyed by the 

 )wn : they are special tendencies of the physiological units derived 



we have 



erm 



) 



bound togetk from that parent. In the fertilized 



y means of ^^ two groups of physiological units, slightly different 



- as bonds of in their structures. These slightly different units 



ent of the oif severally multiply at the expense of the nutriment 



differential supplied to the unfolding germ, each kind moulding 



\ , ^ jeproi this nutriment into its own type. Throughout the pro- 



ic 



;# 



n 



such organic 

 . function toF 



isrf^ 



'unction 



I 



ite organs. 



in 



cess of evolution the two kinds of units mainly agreeing 

 in their polarities and in the form which they tend to 

 build themselves into, but having minor differences, 

 work in unison to produce an organism of the species 



See vol. i. pp. 1 09-207. We have already pointed out the great evolu- 



Is an 



[CtS 



elcme 



dg 

 they 



^^J ^'^onal capacities that seem to be possessed by the phosphoric fats, which 

 :, enter so largely into the composition of ova (vol. i. p. 2 1 2). These fats are 

 closely allied to myeline and other remarkable fatty extracts (see p. 118). 



nts 



J 



arC) 



w 



VOL. II. 



H 



