262 



FORESTRY AND IRRIGATION 



June 



mained until morning, when a second 

 shock, much heavier and more de- 

 structive than the first, brought re- 

 newed consternation upon them. This 

 shock, according to an observer, was 

 preceded by a rumbling like distant 



thunder. A moment later "the earth 

 began to totter and shake so that per- 

 sons could neither stand nor walk. 

 Then the earth was observed to roll 

 in waves a few feet high with visible 

 waves between. Bv and by these 



Fig. 1 Earthauake crack filled with sand forced up from below during 

 New Madrid earthquake, Charleston, Mo. (Photo loaned by Mr. Thomas 

 Beckwith.) 



