248 
THE ABERRATION OF SOUND 
ward, or toward the focus of action. All the windows on the 
western end of the building were broken, while those on the 
eastern end were uninjured. The direction of the waves of mo- 
tion was toward the northwest corner of the building. On exam- 
ining the column marked 6, I found window 2 blown in and its 
frame broken into small pieces. Window 3 was uninjured, while 
4 was in a condition similar to 2, both glass and frame being 
broken. This skipping of alternate windows in the same verti- 
cal line was remarked in several instances, but the broken win- 
dows were not always in the same horizontal line. I remarked 
no .s\’’stematic alternations in injuries to windows of the same 
stoiy. In some cases the transom above the door of a room, the 
door and window being shut, was broken, glass and frame, the 
door blown in toward the room and broken from the hinges and 
S 
MAIN ENTRANCE 
lock, the window remaining uninjured. Many windows on the * 
south side of the building, the side unexposed to the direct force 
of the explosion, were broken and many doors on the south side 
of the hallway were broken and unhinged. The large doors at 
the entrance of the building on the south side were broken from 
hinges, lock, and floor-bolt; one was blown in and the other 
blown out. No damage was noted in the vicinity of the eleva- 
tor shaft, where the air in the building was free to circulate. The 
general rule appeared to be that the doors were forced toward 
the room or hallway having the greater cubical contents. Look- 
ing at the north side of the building, one was impressed with the 
fact that it appeared to have been bombarded, the windows be- 
ing broken in groups. This seems to bear out, to some extent 
at least, the assertion of Professor P. G. Tait, that “in the case 
of a disturbance in air due to a very sudden explosion, as of 
d^mamite or as by the passage of a flash of lightning, it is proVj- 
