.JACQUES LOEB 



299 



therefore no longer equal but had approximately the ratio of about 

 1:2. It was to be expected that the dry weights of the shoots and 

 roots produced by the two sets of leaves should also be in the ratio 

 of about 1: 2, and this was the case (within the hmits of the possible 

 accuracy of such experiments) (Table II). The ratio of the dry 

 weights of the two sets of leaves was 0.54, the ratio of the weights 



Fig. 1. Root and shoot formation in whole leaf and in sister leaf (from which 

 the left half is cut off) dipping with their apices in water. Root and shoot 

 formation only in the wetted parts of leaf. Diagrammatic. 



TABLE II. 

 Duration of Experiment 30 Days. 



