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The Pamphlet Collection of Sir Robert Stout: Volume 47

The Moon

The Moon.

The times at which the moon rises and sets, are given for every day in the year. They are computed for the moon's centre, and those on pp. 6, 7, 8, for a station in lat. 5°, and long. 46h. 4m. W. The correc- page 4 tions for latitude to be applied to the times of setting given in pp. 6, 7, 8, of the Calendar, in order to find the times at which the Moon sets at other stations, may be found approximately from lat. 42° to lat. 48°, by multiplying the number in the adjoining column by the numbers of degrees by which the latitude exceeds 5°. If the latitude be less than 45°, the signs of the corrections must be charged The corrections for latitude 49½ and 50° will be more near the truth, if the multipliers (which according to the preceding rule, would be 4 and 5) be taken as 4½ and 5½.

The corrections for latitude to be applied to the times of rising are the same as those used for setting, but with the signs changed

In strictness, two corrections for longitude are required.—one due to the motion of the moon in Right Ascension during the interval that elapses between her rising for setting) at stations in different-longitudes; and the other due to the change in the moon's declination during the fame interval The average value of the first of these corrections is about two minutes to be added for each hour or for each fifteen degrees of longitude west of the central meridian, 4h. 46m.; the corrections being substracted when the place is to the east of the central meridian

The correct ion for change of declaration maybe disregarded.

The last column in each month on pp. 6. 7, 8, shows the time to which a watch should be set when the sun is due south, or when the shadow falls on the noon mark of a sun dial.

The times of the rising and setting of the sun and moon on pp. 6, 7, 8, without modification, will serve with sufficient exactness for Halifax, Montreal and Ottawa; and by the rules given above they may be adapted to all other stations. On pp. 9, 10, 11, 12, 13, 14, special tables are also given, showing the local civil times at which the sun and moon rise and set at Toronto and Fort Garry, two extreme stations as regards latitude.

5639. 1879. 5639. 1879. Ab .... July 21 "9" 29 Fast of Ab.—Destruc- Elul...... Aug. 19,20 tion of the Temple. Shebat....... Jan. 25 5640 A. M. Adar.......... Feb. 23, 24 Tishri...... Sept. 18, 19 New Year. " 11 March 6 Fast of Esther. " 4 Fast of Gedaliah. " 14, 15 " 9, 10 Purlm. " 10 44 27 Day of Atonement. Nissan......... " 25 [Passover. " 15, 16 Oct. 2, 3 Feast of Tabernacles. " 15, 16 April 8, 9 First two days of " 21 " 8 Hoshanna Rabba. Iyar....... " 23, 24 " 22 " 9 Feast of Eighth Day. " 18 May 11 Lag L'Omer. " 23 " 10 Feast of the Law. Sivan ...... " 23 Heshvan. " 17 " 6, 7 " 28, 29 Pentecost. Kislev.... Nov. 16 Tamuz..... June 21, 22 " 25 Dec. 10 Feast of Dedication. " 17 July 8 Fast of Tamuz. Tebet.... " 15, 16

Jewish Calendar for 1879.