STRENGTH OE FIELD GUN-CARRIAGES, 
561 
II.—Axletrees. 
The axletrees subjected to experiment were tested in the same manner 
as the specimens of brackets; the axletree arms were supported upon 
cast-iron blocks placed 4' 1apart, the upper surface of the axle-bed 
level, and the blow delivered by the falling weight (1134 lbs.) upon a 
wrought-iron block placed centrally across the top plate. The results 
obtained were as follows :— 
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