n of a differential clock, invented ference in the rates is lost, or insteadof making a com- called its annual motion, which causes the four seasons and designed by Mr. H. Conant, of Pawtucket, R. IL, plete revolution—the difference between 1 and 2—it of the year. The exact time occupied by its… … which is the same to the astronomer as longitude is to is recorded by the pointer or hand. the navigator. These meridians are not reckoned Now, as the clock marking sidereal time gains at the Fig. 1—-_THE CONANT DIFFERENTIAL CLOCK. in degrees, but in hours, minutes, and seconds of rate of about 4…
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![An illustration from XIV [i.e. Vierzehnter] Verbandstag Verband deutscher Juweliere, Gold- & Silberschmiede Strassburg, vom 7.-11. August 1914 : verbunden mit einer Ausstellung alter & neuer Goldschmiedearbeiten und Uhren (1914)](https://img.insideoutlibrary.com/img/200/ia-xivievierzehnter00stra-124-83.webp)
