98 



COMrOUND ORGANS OF PLANTS. 



rig. 14. 



Fig. 14. Exi-eriment of Hales to show the force with which the pap ascerrds. c. Stock 

 of vine cut. t. Tube with double curvature fastened to the top of the stock by a 

 copper cap v, which is secured by a lute aud piece of bladder m. n n. Leve' of the 

 mercuritil column in the two branches of the tube at the commencement of Lhe cxpcri- 



