with a metallic border, branches—in a word, to every draughtsman. And its 10-24ths of an inch. easily rendered, by its adjustments, exactly rectangular. cost is such as to place it within the reach of every On the scale plate of the best class of instruments Fig. 2 gives a vertical v iew of the… … LYMAN'S IMPROVED PROTRACTING TRIGONOMETER. that the scale plate and rule are both represented as done by merely bisecting the subdivisions of the three tieians, surveyors, teachers, &c, in various parts of the broken. The engraving is a little more than one-third country who have had an opportunity…
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