1914] 



FULLER— EVAPORATION AND SOIL MOISTURE 



209 



good instance being seen at Sawyer, Michigan, but unfortunately 

 for the purposes of our investigation no such area was available 

 nearer Chicago, and hence recourse was had to a good tract of 

 beech-maple forest at Otis, Indiana, about 20 miles east of the 

 stations at Miller. In this forest, in addition to the two domi- 

 nant trees, there were a few individuals of Tilia atnericana, Prunus 

 serotindj and Liriodendron Tulipifera, while notable in the under- 

 growth were seedlings of the principal trees, together with Asimina 



Fig. 10. — Daily evaporation rates in the oak-hickory forest for the season 191 2; 

 heavy line representing the mean rate for stations 12, 13, and 14, and light line that 

 for station 15. 



triloba, Sambucus racemosa, Evonymus americanus, and such her- 

 baceous species as Dicentra canadensis, Trillium grandiflorum, 

 Adiantum pedatum, Polystichum acrostichoides, Viola rostrala, and 

 Erigenia bulbosa. 



In this beech-maple forest, stations 16 (fig. 11), 17, and 18 were 

 placed about 100 meters apart, upon the floor of the forest, station 

 19 in a rather narrow ravine (fig. 12) about 4 meters below the 

 level of the others, while at station 20 the atmometer was attached 

 to the branch of a tree 2 meters above the surface of the soil. The 



