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Chambers, Robert, 1802-1871 / Chambers's book of days, a miscellany of popular antiquities in connection with the calendar, including anecdote, biography & history, curiosities of literature and oddities of human life and character
Vol. I (1879)
Time and its natural measurers, pp. 1-14 ff.
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Page 4
The Year. The length of the year is strictly expressed by the space of time required for the revolution of the earth round the sun-namely,365 days, 5 hours, 48 minutes, 49 S\ seconds, and 7 tenths 1 of a second, for to such C a nicety has this time been ascertained. But for convenience in reck- oning, it has been found necessary to make the year terminate with a day instead of a frac- tio4 of one, lumping the fractions together so as to make up a day among themselves. About forty-five years before Christ, Julius Coesar, hav- ing, by the help of Sosigenes, an Alexandrian philosopher, come to a tolerably clear under- standing of the length of the year, decreed that every fourth year should be held to consist of 366 days for the purpose of absorbing the odd hours. The arrangement he dictated was a rather clumsy one. A day in February, the sixth before the calends of March (sextilis), was to be repeated in that fourth year; and each fourth year was thus to be bissextile. It was as if we were to reckon the 23d of February twice over. Seeing that, in reality, a day every fourth year is too much by 11 minutes, 10 seconds, and 3 tenths of a second, it inevitably followed that the beginning of the year moved onward ahead of the point at which it was in the days of Cesar; in other words, the natural time fell behind the reckoning. From the time of the Council of Nice, in 325, when the vernal equinox fell correctly on the 21st of March, Pope Gre- gory found in 1582 that there had been an over- reckoning to the extent of ten days, and now the vernal equinox fell on the 11th of March. To correct the past error, he decreed that the 5th of October that year should be reckoned as the 15th, and to keep the year right in future, the overplus being 18 hours, 37 minutes, and 10 seconds in a century, he ordered that every cen- turial year that could not be divided by 4, (1700, 1800, 1900, 2100, 2200, &c.) should not be bissex- tile, as it otherwise would be; thus, in short, dropping the extra day three times every four hundred years. The Gregorian style, as it was called, readily obtained sway in Catholic, but not in Protestant countries. It was not adopted in Britain till the year 1752, by which time the discrepancy between the Julian and Gregorian periods amounted to eleven days. An act of par- liament was passed, dictating that the 3d of Sep- tember that year should be reckoned the 14th, and that three of every four of the centurial years should, as in Pope Gregory's arrangement, not be bissextile or leap-years. It has conse- quently arisen-1800 not having been a leap- year-that the new and old styles now differ by twelve days, our first of January being equivalent to the 13th old style. In Russia alone, of all Christian countries, is the old style still retained; wherefore it becomes necessary for one writing in that country to any foreign correspondent, to set down his date thus: 1ILh March, or 2 athoeteber 28th December 1860o or, it may be 9thiJanuary 1861 'The old style is still retained in the accounts of Her Majesty's Treasury. This is why the Christmas dividends are not considered due till Twelfth Day, nor the midsummer dividends till the 5th of July ; and in the same way it is not until the 5th of April that Lady Day is supposed to arrive. There is another piece of antiquity visible in the public accounts. In old times, the year was held to begin on the 25th of March, and this usage is also still observed in the com- putations over which the Chancellor of the Ex- chequer presides. The consequence is, that the first day of the financial year is the 5th of April, being old Lady Day, and with that day the reckonings of our annual budgets begin and end.' -Times, February 16, 1861. The Day. -There came the Day and Night, Riding together both with equal pace; The one on palfrey black, the other white; But Night had covered her uncomely face With a black veil, and held in hand a mace, On top whereof the moon and stars were pight, And sleep and darkness round about did trace: But Day did bear upon his sceptre's height The goodly sun encompassed with beames bright. Speasger. The da of nature, being strictly the time required or one rotation of the earth on its axis, 4 is 23 hours, 56 minutes, 4 seconds, and 1 tenth of a second. In that time, a star comes round to appear in the same place where we had formerly seen it. But the earth, having an additional motion onits orbit round the sun, requires about3 minutes, 56 seconds more, or 24 hours in all, to have the sun brought round to appear at the same place; in other words, for any place on the surface of the earth to come to the meridian. Thus arises the difference between a sidereal day and a solar day, between apparent and mean time, as will be more particularly explained elsewhere. I I
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