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 944
kept in exact time with the clock of the National Observatory in Washington. Thecentral regulator is stationed in the Western Union Telegraph Companys Building in New York, andis so constructed as to keep time with the highest attainable accuracy. In addition, it is every dayeompared with the clock… … PNEUMATIC CLOCK. 910 WATER-GAUGE. 4-23-2. connection. By this it must not be inferred that the clock in question is kept in exact accord witheither or all of the observatory clocks, that being a mechanical impossibility. The range of varia-tion, however, is kept within a few hundredths of a second.…
Mechanical engineering -- Dictionaries
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![An illustration from Essai de physique, par Mr. Pierre van Musschenbroek ... avec une description de nouvelles sortes de machines pneumatiques, et un recueil d'expériences par Mr. J. v[an] M[usschenbroek] Traduit du hollandois par Mr. Pierre Massuet .. (1751)](https://img.insideoutlibrary.com/img/200/ia-essaidephysiquep01muss-480-77.webp)
