﻿LIVING PLANTS 



here the exact results attained by each one, 

 except to note that the first investigation of 

 the subject was made by de Saussure in 1804, 

 and from his experiments upon leafy shoots 

 of wood\^ plants he was led to assert that 

 leaves may not carry out full development, 

 or maintain normal existence when the food- 

 forming processes were inhibited. Subse- 

 quently in dealing with various phases of the 

 question Boehm, Kraus, Rauwenhoff, Stebler 

 and Vochting arrived at results in harmon^^ 

 with those of de Saussure. On the other 

 hand Batalin, Vines, and Jost have reached 

 results quite to the contrary. Corenwinder 

 made two series of experiments, one series re- 

 sulting positively, the other negatively. 



The experiments which would be of value 

 in the decision of this question consist in al- 

 lowing young leaves of many species of plants 

 to develop under such conditions that no food 

 can be formed. 



To place leaves under such conditions that 

 the chloroph\'ll-bearing cells may not carry on 

 the formation of food, and that all growth 

 must be carried on by means of food brought 

 from a distant portion of the plant, several 

 methods may be used, viz.: the leaf may be 

 enclosed in a dark chamber consisting of a 

 small box which will exclude all rays of light 

 from the leaf, without which the chloroph3'll 



