Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 945
Observatory.The chronograph is electrically connected with bothclocks, and records the pendulum-beats of each on theStrip of paper. If the beats are exactly synchronous,the dots Stand side bj side. If the beats are not syn-chronous, the dots will be separated by an interval, longor short according… … Supposing the clock to be beating seconds, and the chro-nograph to discharge an inch of tape each second, it isobvious that the dots recording the beats of each clockwill stand one inch apart. It is obvious, too, that thelineal space between the recording dots of two clocksnot beating exactly…
Mechanical engineering -- Dictionaries
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