all. Fig. 3 represents an by the hammer compresses and proportionately stiffens the iron plate with one each of the blows, respectively shown small surface upon which it is delivered, and creates a local in Fig. 2, at B and OC, delivered upon it. Then, the in- tension u; on the surrounding metal.… … the spring and rebound ‘tion. If we take a ball-faced hammer, the effect will be pro- properly delivered ones; and though the whole plate may be of the plate ; and the ‘duced as shown ° stiffened by the gros-amount of blows, yet there will be £1g.6. effect of the blow will be distributed over a…
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