204 Prof. J. Le Conte on the Freezing of Vegetables. 
stances would, of necessity, tend to establish a greater inequality 
of contraction, when the frigorific influence began to operate, 
, therefore, a greater liability to rupture; and secondly, be- 
But it may be asked, if the freezing of the sap does not always 
kill plants, in what manner does cold produce death in vegeta- 
bles? As this is a point which has been investigated by Gép- 
_ pert, Morren, Lindley and others, I do not propose to notice it far- 
ther, at this time, than to indicate the learning of their deductions 
on the subject under consideration. The observations of MM. 
‘4. A chemical decomposition of the tiesniee and its contents, 
ar 5 the chlorophyll. 
“5. A destruction of the vitality of th sto 
of the action of its vessels, 2% x ee . ise 
