Gents Mag 1747 p.223

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	Gentleman's Magazine 1747 p.223
waywiser
	Waywiser The Method of fixing a new invented Machine for Land Measure; to be apply'd to the inside of the seat of a coach, chariot, &c. LET a flat piece of iron be placed on the axletree, as E E E in Fig. 2. in the margin; let a bar, of sufficient strength, go from thence into the seat of the coach, D D D; to the end of this bar, let the machine in form of Fig. 3. be fixed with screws; let a lever be made to play free of the flat plate, by means of a thin colet, as in rge figure; let a pin be put into the wheel, as at d, in such a manner as to strike the lever at S, by which means the other end at R will, by its contact with the wire fastened to to the slifing part of the work within, move one tooth every revolution of the wheel, thereby discovering the true distance of places by the index on the dial. The spring W is to throw back the lever to its proper place, when by backing the carriage it has been turned the contrary way. In order to allow for the motion of the coach, the bar D D D must be fixt to the plate E E E by a shoulder screw, allowing a little play between, which will answer any motion of the coach upwards or downwards, and by its natural turn from the centre allow for every side motion. Another sort, design'd for the back of a coach, chaise, or single horse-chair wheels, may have two principal hands go from the centre, as in Fig. 3. When
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