nected with the sidereal clock. At every alternate sccond, a jog is made in the line. The intervening jogs record the time of passage of a fixed star across across the meridian at Waltham is noted in the and a chronograph at Harvard University, con- the field of the transit, works’ observatory on… … On shelf on rear wall is the chronograph. To the left is the switch- The barometer, and, on shelf at right, the level-tester for correcting board, for controlling the lights and the electrical connections from transit levels, the clocks to the various workrooms, Astronomical Clock in Inner…
Internet Archive · Public domain (published before 1931). Free to use for anything.
