49/101 45.) This makes the cross section to be tested 2" X 3". Some of the blocks are cut radially and some tangentially, as indicated in the figure. 45 .-- Design of cleavage test specimen.] The free ends of the hooks are fitted into the notch in the end of the specimen. The movable head of the machine is then made to descend at the rate of 0.25 inch per minute, pulling apart the hooks and splitting the block. |