116 



REGENERATION 



was 2.082 grams and the dry weight of the 6 shoots was 274 

 miUigrams. One gram of leaf produced therefore 132 milhgrams 

 dry weight of shoots. (The experiment lasted from Nov. 8 to 

 28.) 



Simultaneously 6 stems also with one apical leaf each, but with 

 the anlage of the shoot opposite the leaf cut out (Fig. 92), were 



Fig. 91. — Growth of shoot is more rapid in Fig. 91 than in Fig. 92, p. 117. 



treated in the same way. In this case each stem formed a shoot 

 in the second node below the leaf but on the side opposite the leaf 

 (Fig. 92). The shoot formation began later and 2.053 grams of 

 dry weight of leaf produced 126 milligrams dry weight of shoots, 

 or 1 gram dry weight of leaf produced 62 milligrams of shoots. 

 Hence the same mass of apical leaf produced a smaller mass of 

 shoots when the sap from the leaf had to travel farther downwards 

 before reaching the anlagen for the shoot. The inference sug- 



