The theory and practice of surveying. Designed for the use of surveyors and engineers generally, but especially for the use of students in engineering (1886)
Johnson, J. B. (John Butler), 1850-1902 · New York, J. Wiley & sons · leaf 183
the instrument remains *54 SURVEYING. stationary on the paper (the rollers R not turning) and thetracing-point moved laterally, it will cause no motion of thewheel, since its axis is parallel to the arm F, and turns aboutthe same axis with F, but 900 from it; the wheel £, therefore,moves parallel…
Surveying
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