above were crushed be- y ia F\\ l A i \ tween steel plates. a7 4 _ : : ae No. 3 crushed at 387,(00 , : . pounds; equal to 7,750 pounds £é& 4™= YT ami) to square inch. 7 4 . No. 4 crushed at 30,000 : pounds; equal to 7,500 pounds — ai \ to square inch. a \ Nos. 3 and 4 were crushed — = : - between… … \ \ " at the corners and edges es. \ \ pecially, and hence unsuit- ih \\ able for use as first quality : \ front or face bricks. These = We + LE \\ N serious objections have been : i\\ ’ overcome by Gregg’s brick = | \ machines. The mechanical construc- ¥ { : ue \\ Ra tion of these machines is’such…
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