<n ogee 
130 Scientific Intelligence, 
Prof, rm of Kénigsberg, On the Change in the Direction of the 
branches of wo ood y plants caused by low degrees of temperature. full 
winter. Perhaps the winter position of oh a which we naturally 
attribute to loading with snow is partly owing to the movement which 
aioe Caspary describes. The only known observation before published 
ade. b : Li 
their weight; and as the day advanced and grew warmer they regained 
their original position. Lately Von Wittich, he profeencr of Physiology 
mm iversi 6 
, &e. 
detailed observations and experiments. The results are: 
branches of all trees sNowed a displacement in a lateral direc- 
i 
e 
tent of one or two inches; those of a Lime-tree, perme rh, Larch, a 
White Pine to the right, the former as much as nearl y 34 inches, at the 
poiat measured. (The length of the branches not dtr nor why 4 
eee is not given in angular deviation. 
. The e, Larch, White Pine, and some others exhibited a droop- 
ing sitaserient as soon as frost began, and they drooped the lower as 
grew more severe, the os ac ‘sein of the lowering in the 
Lime reaching to fully three fee 
3. The branches of other spsbie of trees begin to rise as soon as frost 
sets in, and rise the higher the severer the frost. Examples are Ptero- 
earya Caucasica and Negundo. 
4. The branches of other species exhibit a rising motion during mild 
frost, but a drooping one when the cold is intense. Such are the Horse- 
ges Buckeye, and ail The latter two oo at 10° F., 
the Horse-chestnut re) So ey! . 
