...Of course the road was of the roughest description, and sometimes we had to hold on with all our might to avoid the concussion of our heads with the wooden roof... 
Lady Sarah Wilson 「South African Memories」
...Severe blows on the head, striking the head against some hard object whilerunning, or falling on the head may cause concussion of the brain...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...The spinal cord is liable to concussion from blows and falls, and paralysis,to a greater or less extent, may be the result...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...This maybe done with a chisel and a small hammer if the bandage is carefully held by anassistant so that the concussion of the blows is not transmitted to the injuredbones...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
... and dazzling bolt ofgreenish fire came hurling suddenlyout of the west and, with athunderous concussion, seemed tofasten itself on the crest of Fragoni’spalace...
Various 「Astounding Stories of Super-Science, March 1930」
...A long time later the concussion of a vast explosion...
Various 「Astounding Stories of Super-Science, August 1930」
...The concussion blew thefabric off 'em...
Murray Leinster 「Morale」
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