particular step for any length of time a bolt is provided, by means of which it can be prevented from closing. Brass or iron handles should be screwed to each upright, at a suitable height for grasping. In cases where the upright divisions are slender,

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and will not allow the woodwork to be cut away for the insertion of the step, those illustrated in Figs. 36 and 37 will be found useful. They are screwed to the outsides of the uprights, and do not require any fitting. The step is removable, and may be raised