Hood, Grant · Kansas City, Mo. : Kansas City Jeweler and Optician · leaf 19
METHODS IN HOROLOGY. year exactly at noon. The observations are taken from cer-tain fixed stars by th.e transit instrument shown in Pig. 3. Theutmost accuracy must be used in making and setting up atransit. It points due north and south, and can be placed inany position from the vertical to the… … Fig. 4—Instrument Used for Sending Out the Time. outside and the inside lined with the same material, havingan air space between. There is no way of heating the room,as it is necessary to have the temperature inside as nearly thatout-of-doors as is possible, to produce the best results. Thetransit…
Clocks and watches
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