1896.] Water Current in Cucumber Plants. 451 



involved, as in the case of instinct. This " may give the 

 reason, e. g., that instincts are so often coterminous with the 

 limits of species. Similar structures find the similar uses for 

 their intelligence, and they also find the same imitative 

 actions to be to their advantage. So the interaction of these 

 conscious factors with natural selection brings it about that 

 the structural definition which represents species, and the 

 functional definition which represents instinct, largely keep to 

 the same lines " (ref. 5). 



6. It seems proper, therefore, to call the influence of Organic 

 Selection " a new factor ; " for it gives a method of deriving 

 the determinate gains of phylogeny from the adaptations of 

 ontogeny without holding to either of the two current theories. 

 The ontogenetic adaptation* are rendu new, not p, rformed ; and they 

 are really reproduced in suece* ding g, aerations, although not physi- 

 cally inherited. 



{To he continued.) 



By Erwin F. Smith. 

 {Continued from page 378). 

 2. Upward Movement of One Per Cent. Eosine Water 

 Through Cut Stems Plugged with Gelatine. 

 In all of these experiments a somewhat stiff gelatine was 

 used (15 per cent.) to secure a relatively high melting point 

 (about 27° C.) and this was tinged with India ink, so that the 

 location of the gelatine plugs inside of the vessels could be 

 determined accurately on cross section. Both substances 

 being as far as has been determined inert to the plant, it is 

 not likely that they could have in any way injured the carry- 

 ing capacity of the walls of the vessels. 2 



Recently Dixon and Joly (Annals of Botany, Sept., 1895, p. 403 



