rff\ 



\ 



D 



B 



B 



Fig. 



Fig. 7 Fig. 8 



7. Diagram showing essentials of original form of non-absorbing mount- 



ing of the porous cup atmometer. G, reservoir; E, supply tube; C, D, mercury 

 valves. Further description in text. (Reprinted from Plant World 13: 70. 1910.) 

 Fig. 8. Improved form of non-absoring porous cup atmometer <1(>\ ised by 

 Shive. 



61 



