Bui. 365, U. S. Dept. of Agriculture. 



Plate XIII. 



FlQ. I.-Case 82 AT 3.20 P. M. 



Fig. 2.— Case 82 at 3.24 p. m. 



FiQ. 3.-CASE 82 at 3.27 p. M. 



Fig. 4.— Case 82 at 3.56 p. m. 



Fig. 5.— Case 82 at 3.56 p. m., After 

 Falling. 



Fig. 6.— Case 82 at 3.59 p. m. 



