MERIDIAN PASSAGE OR SOUTHING OF THE MOON. For places west of Washington add two minutes for each hour of longitude. Full-faced (black) type indicates p. m. Jan. Feb.Mar. Apr. May. June. July. Aug. Sept. Oct. | Nov. Dec. 1 12 2 21 1 3 2 14 2 54) 4 43 5 12 6 10 7 11 7 30 8 29 8 36 1 2 2 1 There will be four eclipses this year, two of the Sun and two of the Moon, and a transit of Mercury, as follows: II. Total of the Sun January 14, invisible in North America. II. Partial of the Moon January 29, partially visible in the United States, the Moon setting with the eclipse on in the Eastern states. See the figures and table following Eclipse IV. III. Annular of the Sun, July 10, invisible in North America. IV. Partial of the Moon on the evening of July 24 and morning of July 25, visible throughout North America, as shown by the following figures and illustrations: ECLIPSE II. Eastern Central Mountain Pacific Time. MOON a W. MOON Time. In In vis vis ible. ible. Time. H.M. 3:46 AM Invis- Time. H.M. 2:46 AM 4: 6" 5:38 " Invisible. A transit of the planet Mercury over the Sun's disk November 14, partially visible in the United States, the Sun rising with Mercury on its disk. In observing this transit smoked or colored glass should always be used, otherwise serious injury to the eye is apt to follow. Look for the planet well to the north of the Sun's centre, and the planet will be seen moving across from west to east, passing off at 8:42 a. m., Washington mean time. Time. 8:59 PM H.M. H.M. H.M. 7:59 PM 6:59 PM 5:59 PM (c) 11:22 9: 4 " 10:22 " 11:41 8: 4 9:22 10:41 7: 4" 8:22 ས 9:41 Moon enters Penumbra or Light Shadow at (a) Moon leaves Umbra or Dark Shadow Note.-Twilight is considered to last until the Sun is 18° below (vertically) the horizon, and to begin when the Sun reaches a similar point in the morning-ar 18° before sunrise. When the line on which this 18° is measured is shortest then the twilight will be the shortest, and vice versa. This causes the shortest twilights to occur in the winter months in northern latitudes, and longest in summer. By an examination of the chart we find the measure of twilight, darkness and daylight of the 24 hours to be: Jan. 1, Length of day.. .15h. 34m. 2h. 30m. 8h. 54m. June 21, Length of day. Length of twilight. The remainder of the space will more than make the 24 hours, which is due to refraction of light, which causes an increase in the apparent length of the day, as also of duration of the twilights. This apparent error is greatest in the winter months, as the Sun then shines through a denser and deeper atmospheric envelope. *EXPLANATION.-The term "Light Year" is the time required for light to travel from these bodies to the earth. Their actual distance, in miles, being too great for use or comprehension, the distance, in miles, may be found by multiplying the velocity of light (183,000 miles per second) by the number of seconds in a year. and that product by the light years. Thus: Alpha Centauri = 3.6X183,000X365X24X 60X60 miles distant. Note. The time for the phenomena given in the table above is for the geocentric event, and as seen from the earth's surface the error may be as much as 21m., more or less; but the given time is near enough for all purposes and places, 7 37 4 31 6 19 7 80 4 38 6 32 ev 25 12 3 53 7 37 4 32 7 19 7 30 4 39 7 30 1 4 ""Time.") Sun at noon mark. (See Note under Day of week.... Day of month... Day of year..... Calendar for Me., Calendar for Boston, Mass., Calendar for Charleston, S. Calendar for N. York City; Cal. for Wash, D. C., So. New York, Conn., Del., Md., V, W R. I., Pa., N. J. North- Va., S. Ohio, S.Ind., ern part of Ohio, Ind., S.Ill., N. Mo., Kan. and Ill., So. Iowa, Neb., Cent. Col., C. Utah N. Col., Utah, Nev., Cal. C. Neb.. C. Cal. Moon Moon Sun Sun rises H. W. Sun Sun rices Sun Sun rises rises. sets. and N. Y. rises. sets. and rises. sets. and sets. H.M.S.H. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH. MH.M 1Tu ..12 3 24 2 2W |