c 



Fig. 5 (I 



St 



c 



V) 



R 



Fig. 4. Diagram showing the essentials of the Bellani plate atmometer. 

 R, burette reservoir for water; D, porous clay plate; S, metal support for D, 

 connected to burette by supply tube (E). 



Fig. 5. Diagram showing essentials of absorbing mounting of the porous 

 cup atmometer. R, bottle reservoir for water; D, porous clay cup, with thick- 

 ened rim (<S), mounted by rubber stopper (St) on supply tube (E). C, cork 

 stopper, with air opening at one side. 



58 



