ay be passed of Napanee, Ontario, Canada. through the ring or loop at the upper part of the frame, BENNETT’S KEY-HOLE GUARD. A cast iron air pipe is placed lengthwise in the and the two hooks forming the lower end of the frame, by means of which engagement is made with the trace links, may either… … longitudinal girder, as shown in the expense. Mr. Jno. B. Bennett, 620 Atlantic sectional view, and upon the inner FOR STEAM BOILERS. Avenue, Boston, Mass., has lately been ends of the platforms are A-frames, allowed a patent for this device. For braced by struts, these frames sup- porting a heavy…
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