of a powerful screw or hy- of high speed in belts has been long known in England and as a precautionary matter, as shown at e e; but the keys draulic press. The force required is about thirty or thirty- in some parts of Europe, and many wonderful examples there must, as I have before stated, fit… … What Professor Willis says in regard to American prac- turning, and do not work loose. Plate couplings must be chines. An adjustable coupling, to be good for anything, tice has continued to be the practice since this was written, fitted in precisely the same manner. If a plate coupling be must…
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