The Popular Encyclopedia

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Seite 49 - only, since compound bodies have their combining proportions, which may likewise be expressed in numbers. Thus, since water is composed of one proportion, or 8, of oxygen, and one proportion, or 1 , of hydrogen, its combining proportion is 9. The proportion of sulphuric acid, is 40, because it is a
Seite 39 - within a day or two, the eras of every nation, and to reduce them to the Christian era. The Roman Era. The Roman year, in its arrangement and division, is that on which our year is entirely founded. The Romans reckoned their time from the date which some of their antiquaries chose to assign for the
Seite 39 - to the course of the moon, but to which from time to time, a month is added, whenever the year would range too widely from its original situation. This year is inconvenient, from its varying duration; but as, in a long course of years, the months remain nearly at the
Seite 41 - Period is a term of years produced by the multiplication of the lunar cycle 19, solar cycle 28, and Roman indiction 15. It consists of 7980 years, and began 4713 years before our era. It has been employed in
Seite 39 - and is even now that of the Chinese, Tartars, Japanese, and Jews. All these varying modes render the comparison of dates much more difficult than it appears to be at the first view. We shall endeavour so far to simplify the calculation as to enable any arithmetician to
Seite 293 - martyrs, divines, &c. In 1656, he published the Church history of Britain, from the birth of Jesus Christ to the year 1648; to which was subjoined the History of
Seite 42 - year of 366 every four years, like the Julian year. The months were of 30 days each, with 5 additional. To compute it, deduct 323 from the given year, and the remainder will be the year of the Christian era. If before Christ, deduct the year from 324. The Era
Seite 43 - NS In the year 1600, the year began on the 7th of April, NS, from which it has now advanced four days, and, from the precession of the equinoxes, is still advancing at the rate of a day in sixty years. The number produced by subtracting 3102
Seite 289 - wicks upon which it burns; for, as long as these are fed with spirit, in a proper manner, they continue to yield flame of precisely the same strength. The cotton, or other materials, of which the wick is composed, is not scorched or consumed in
Seite 39 - varies through all the different seasons. A lunar year consists of 12 moons, or 3¿54 days. This may be convenient enough for short periods, but is so ill adapted for the computation of a civilized nation, that none but

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