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Scientific American, Vol. 39, No. 22 (November 1878) (1878)

leaf 3

An illustration from Scientific American, Vol. 39, No. 22 (November 1878), 1878, leaf 3
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-… … parts of London and Great Britain, and are now carrying HALLECK'S PLATEN GAUGE. out some large orders. This rail seems to supply a want in one of its edges a shaft carrying the usual grippers. Ad- McGEE'S DRAUGHTING PENCIL. tramway roads, and is now being adopted so freely as to in- justable finger…

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