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Time and its measurement (1909)

Arthur, James, 1842-1930 · Chicago · leaf 20

An illustration from Time and its measurement, 1909, leaf 20
he year the sun isght and your mark may be set at 121 these days, but you may use an al-anac and look in the column markednean time at noon or sun on meri-an. For example, suppose on theight day when you are ready to placeDur noon mark you read in this)lumn 11:50, then when your watchlows 11:50… … Fig. 3—Noon-Mark Sundials SUN ON NOON MARK, 1909 Date ClockTime Date ClockTime Date ClockTime Jan. 2. ..12:04 May 1. ..ll::-.7 Sept. 30. ..11:50 4. ..12:05 15. ..11:50 Oct. 3. ..11:49 7. ..12:00 28. ..11:57 6. ..11:48 9. ..12:07 June 4. ..11:58 10. ..11:47 11. ..12:08 10. ..ll:.-i9 14. ..11:46 14.…

Time · Clocks and watches

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