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A treatise describing the construction, and explaining the use of new celestial and terrestrial globes : designed to illustrate in the most easy and natural manner, the phaenomena of the earth and heavens, ant to shew the correspondence of the two spheres : with great variety of astronomical and geographical problems / by George Adams, mathematical instrument-maker ...
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Celejlial and terrestrial Globes, 183

tract the intire days of the Julian, reduc-tion, the remainder is the number of daysfrom the kalends of January old stile;add thereto eleven days, and you obtain thenumber of days from the said kalends ofJanuary new stile; from which if you deductthe nearest less number in the table ofmonths (which numbers express the lastdays of each month) the residue is the dayof the succeeding month.

But when the sum of the Julian reduc-tion contains eighteen hours above entiredays, it is a bissextile year; then one daymore must be added to the entire Juliandays before the subtraction is made.

When there are no hours in the Julianreduction, that is the first year after a bissex-tile ; if six hours, the second; if twelve-hours, the third ; and when eighteen hoursabove entire days, it is the bissextile year,And when the last result exceeds 12hours, add 1 to the days, and subtract \zfrom the hours, and you change the timefrom astronomical to the civil reckoning.

To gain the time of the equinox on anyother meridian, add the difference of meri-dians to the time found in the first meri?

N 4 dian.