y draughtsman. And its nometer is a draughting board with a metallic border, 10-24ths of an inch. cost is such as to place it within thereach of every easily rendered, by its adjustments, exactly rectangular. practical man. On the scale plate of the best class of instruments Fig. 2 gives a vertical… … ticians, surveyors, teachers, &c., in various parts of the done by merely bisecting the subdivisions of the three that the scale plate and rule are both represented as country who have had an oppurtunity to examine finer scales, changing the figuring and appending an broken. The engraving is a…
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