. Time and its measurement . 1900 wasa common year, because jp hundredsis not divisible by four; 3000 will bea leap because .?o hundreds is divisibleby four; therefore 3100, 3300 and3300 will be common years and 3400a leap, etc., to 4000 which must bemade common, to keep things straight,in spite of the fact that it is divisibleby four both in its hundreds and thou-sands. Rut for practical purposes, dur-ing more than two thousand years tocome, we may simplify the rule to:Years and eve^i hundreds divisible byfour are leaps. But great confusionstill exists as a result of several coun-tries holdin
. Time and its measurement . 1900 wasa common year, because jp hundredsis not divisible by four; 3000 will bea leap because .?o hundreds is divisibleby four; therefore 3100, 3300 and3300 will be common years and 3400a leap, etc., to 4000 which must bemade common, to keep things straight,in spite of the fact that it is divisibleby four both in its hundreds and thou-sands. Rut for practical purposes, dur-ing more than two thousand years tocome, we may simplify the rule to:Years and eve^i hundreds divisible byfour are leaps. But great confusionstill exists as a result of several coun-tries holding to their own old present Chinese year has 384 days,13 months and 13 full moons. Com-pared with our 1909 it begins on Jan-uary 31st and will end on February 8,1910. Last year the China-Japan cal-endar had IS months, or moons, butas that is too short they must put inan extra every thirtieth month. Weonly allow the error to reach one day and correct it with our leap years, butthey are not so particular and let the. Fig;. 19—Japanese Strikine Clock with Two Balancesand Two Escapements; Dial Stationary, Hand Moves error grow till they require anothermoon. The Old Testament is fullof moons, and even with all our mo-dernity our feasts and holy days areoften variable on account of beingmixed up with moons. In Japan thepresent year is the 43nd of Meiji, thatis, the 43nd of the present Emperorsreign. The present is the Jewish5669. These and others of varyinglengths overlap our year in differentdegrees, so that in trade matters greatconfusion exists. The Chinese andJapanese publish a trade almanac inparallel columns with ours to avoidthis. It is easy to say that we oughtto have a uniform calendar all over theworld, but the same remark applies just 30 TIME AND ITS MEASUREMENT as much to money, weights, measures,and even to language itself. Finally,the difficulty consists in the facts that 3- TSU 1 |pfEi KIAH 1 1 ?£CHou 2 2 YIN. a ^ Ym. 3 f^ PIN&. 3 W MAO ^ T TiNG 4 Mr SHEN
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