. Proceedings of the annual convention . , thus showing the effect of the finish. Treatment.—The experiments consisted of three treatments. In thefirst the specimen was placed on bearings 3 inches apart under apunch plunger equipped with a tool % by 4 inches wide, with roundededge. The operation of the punch resulted in the shape shown by speci-men No. 3 in photographs. In the second treatment the first tool wasremoved from the plunger and replaced with one having a square specimen, already bent by the first treatment, was placed on a flatsurface and pressed down by the punch to the sh
. Proceedings of the annual convention . , thus showing the effect of the finish. Treatment.—The experiments consisted of three treatments. In thefirst the specimen was placed on bearings 3 inches apart under apunch plunger equipped with a tool % by 4 inches wide, with roundededge. The operation of the punch resulted in the shape shown by speci-men No. 3 in photographs. In the second treatment the first tool wasremoved from the plunger and replaced with one having a square specimen, already bent by the first treatment, was placed on a flatsurface and pressed down by the punch to the shape shown in specimenNo. 4. After this a plate was put under the specimen and the thirdtreatment with the punch resulted in the shape shown in specimen No. stroke of the punch plunger was the same in all cases, thus makingthe treatment uniform. The only exception to these treatments was inspecimens Nos. 20 to 23, which were placed on edge and struck with thepunch plunger. The marks on the edges show the location of the
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