Slide Rest

In ordnance construction, an appendage to the turning lathe, so contrived as to hold a tool firmly to the work; and while cutting a shaving from the bar in the lathe, the tool is slid gently along and the bar is turned quite true. Slide It Rule. A contrivance 'for using logarithms are mechanically. deals —with manti as only, characteristics obtained by inspection. It consists of a rule, in the middle of which is a slide. The edges of the groove and the edges of the slide are graduated, forming four scales. An indicator, which can be set at any point, guides the eye in selecting opposite numbers. Sliding Caliper. — An instrument used for measuring specimens of metal to be tested. A vernier is attached reading to thousandths of an inch.