ovember 17, 1874) a simple form of lifting jack, which, ing widths. It is an efficient guard against the ingress of while an efficient and useful implement, can be made and flies, mosquitoes, etc., is durable, and not costly. It consists sold at a very cheap rate. The standard is of oak, and is… … secured by an adjustable pivot. The upper part of said These rollers, about which the cloth is wound so as to adapt handle is rounded, and takes against a similarly formed it to the width of the window, are held in place by two brass portion of the lifting step, as indicated by the dotted lines.…
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