TWINERS. 109 



shall find them pointing towards the east, the 

 south, or the north ; in short, they are revolv- 

 ing in search of something to twine upon. 

 When the young internode is very short, say 

 two or three inches long, its motion is so 

 slow as scarcely to be observed. If we mark 

 the position of its tip, however, at different 

 times of the day, we find that it makes a 

 complete revolution in about twenty-four 

 hours. As the shoot increases in length the 

 motion becomes more rapid, a complete revo- 

 lution being made in two or three hours. If 

 the shoot strikes no support, it will make 

 thirty or more revolutions and then become 

 riofid. Before this number of revolutions 

 has been made, other and younger inter- 

 nodes will have been formed, and they re- 

 volve in the same manner as the first and 

 lower one. All the younger internodes will 

 be carried around by the lowest one which is 

 revolving, and each one will be making its 

 own separate revolution, so that the whole 

 stem presents a peculiarly crooked appear- 

 ance. About three internodes will be in 

 motion at one time. The circle which the 

 tip of the stem describes may be four or five 

 feet in diameter, and it wiU move at times 

 over thirty inches an hour. There is an- 



