ually so destructive to ordinary tongs which has but to 41 Ib. on the square foot. This great pressure, however, there is no requirement issued by the Board of Trade re- one bearing, thereby saving the pin from wearing and break- was nearly reached again on the 12th of March in the same specting… … dulled by use, the tapering pin, which that the pressure of 30 lb., adopted by holds cube in, can be taken out and a some eminent engineers, is consider- sharp edge of cube placed toward pipe for use, until all of understood rule in the engineering profession regarding wind ably too low to…
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