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MODERN STEAM l’RACTICE.

the large end are square, surface thereby being gained for taking thethrust. The butt has a large hole cut out, for lightening it, tending toreduce the balance weights placed on and between the spokes ofthe driving wheels. The bush for the small end of the rod is tight-

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ened up with a single key and jibs, with side nut for holding the keyin position, as likewise a split pin on the under side. In anotherexample (Fig. 482) the small end is forked; the bushes at both endsare lined with white metal; the ends of the bushes are not square, but