dly constructed, and supported so as to offer N. J. the best resistance to wear and tear; and, secondly, the rails It is especially designed for drawing parallel lines to rep- and attachments should be made so as to offer the greatest resent the coast or shore in map drawings; but it is applica-… … justable finger bars, B, are clamped by their slotted ends to Its construction will be clearly understood by reference to split nuts, C, that slide on the rods, D, and are moved by Fig. 2. A is a tube, having at its lower end a fork, B, the screws, E, which, together with the rods, D, are sup-…
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