Howe, Herbert A. (Herbert Alonzo), 1858-1926 · Meadville, Penna., Flood and Vincent · leaf 164
nex-plicable ways. His occupation is largely an unrelentingchase after errors, which must be determined and takeninto account. A chronograph is considered an indispensable part ofthe instrumental equipment of an observatory. It isused, as its name indicates, for noting time. At any in-stant when an… … A chronograph. Fig. -A Chronograph. draw the same circle over and over again on the paperwhich is wrapped around the cylinder. But the mech-anism is so arranged that the pen-carriage slides slowlyfrom one end of the cylinder to the other. The pentherefore traces upon the paper a long spiral line,…
Astronomy
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