VARIATION AND HEREDITY 141 



hereditary qualities are carried by represent- 

 ative particles in the germ-cells, we can in a 

 measure understand the origin of the kind 

 of variation referred to; for extraordinarily 

 intricate permutations and fiornhinatirms gY* 

 (Hi in ,the_ microcosm of t.hp 

 Particularly in the process of 

 there what we might jEall a shufffjpff of 

 Qards even a throwing away of half of the 



pack. In fertilization, ftgain. paternal and 

 maternal contributions f<7rOT a - ne V junity. 

 Perhaps there may be, as Weismann sup- 

 poses, a struggle between rival hereditary 

 items. 



But therejseems to be 

 varja-tiop. .qii^jit.fl.tiye rather 



rather jh an architecturaL 



when something distinctively ne\y 

 What can be said as to their origin? Weis- 

 mann has suggested that the oscillations and 

 changes in the blood and other nutritive 

 fluids may stimulate the germ-plasm to a new 

 departure. It may also be that important 

 changes in the environment may saturate 

 through the body and provoke the germ- 

 plasm to vary. There are other "may 

 be's." 



With all recognition and appreciation of 

 the work and thought above summarized, 

 we cannot but think that the secret of varia- 



