Page:The slide rule; a practical manual by Pickworth, Charles N.djvu/2

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ELASTIC STRIPS which are let into the sides of the stock ensure smooth and even movement independent of atmospherical Influences.

The stock, being covered with CELLULOID on both TOP and HOTTOM, cannot warp, as wood and celluloid ten differently affected by climatic changes. ALL CELLULOID SCALES are screwed on to the wood.