| Joseph Harris - Astronomical models - 1732 - 190 pages
...Pole is placed, and the opppfite one is the Southern Hemifphere. The Aftronomers divide all Circles **into 360 equal Parts called 'Degrees, each Degree into 60 equal Parts called Minutes,** each Minute into 60 Seconds, &c. But befides this Divifion into Degrees, the Equir noftial is commonly... | |
| Robert Shirtcliffe - Gaging - 1740 - 283 pages
...divided the Circumference of a Circle into 360 equal Parts, each of which they called a Degree ; and **each Degree into 60 equal Parts called Minutes ; and each Minute into 60** Parts called Seconds, and fo on to thirds, fourths, &c. every Arch of a Circle, being denoted by the... | |
| Robert Simson - Trigonometry - 1775 - 520 pages
...circumference of a circle is fuppofed to be divided into H h ' 360 360 equal parts called degrees, and **each degree into 60 equal parts called minutes, and each minute into** 6e equal parts called feconds, &c. And as many degrees, minutes, feconds, &c as are contained in any... | |
| Benjamin Donne - 1796
...calculating the proportion which angles bear to each other, fuppofe the circumference of every circle **to be divided into 360 equal parts, called Degrees ; each degree into 60 equal parts, called minutes** ; each minute into 60 equal parts named feconds, &c. Ar. B. Sometimes the circumference of a circle... | |
| Alexander Adam - Classical dictionaries - 1802 - 858 pages
...radii of the fame circle are always equal to one another. The circumference of every circle is fuppofed **to be divided into 360 equal parts, called degrees ; each degree into 60** mi* ņutes \ each minute into 60 feccnds ; and thefe into thirds, fourths, &c. greater or Ąefs according... | |
| John Bonnycastle - Trigonometry - 1806 - 419 pages
...arc of a circle contained between its two legs, and having the angular point for its centre. Every **circle is supposed to be divided into 360 equal parts,...; each degree into 60 equal parts, called minutes** ; each minute into 60 equal parts, called seconds ; &c. So that a semicircle, or half the circumference,... | |
| Astronomy - 1808 - 272 pages
...Ecliptic. This circle we suppose to be divided into 12 equal parts, called Signs ; each sign . into 30 **equal parts, called Degrees ; each degree into 60 equal parts called Minutes ; and** every minute into 60 equal parts, called Seconds; so that a second is the 60th part of a minute ; a... | |
| James Ferguson - Astronomy - 1809 - 533 pages
...ecliptic. tic. This circle we suppose to be divided into 12 equal parts, called signs ; each sign into 30 **equal parts, called degrees; each degree into 60 equal parts, called minutes; and each minute into 60** into 60 equal parts, called seconds : so that a second Plate I. is the 60th part of a minute ; a minute... | |
| John Ewing - Astronomy - 1809 - 538 pages
...another. Every circle, whether large or small, is supposed to be divided into 360 equal parts, which are **called degrees, each degree into 60 equal parts called minutes, and each minute into 60** seconds, and so on in a sixagesimal division as far as you please. If the earth be supposed to turn... | |
| Thomas Keith - Navigation - 1810 - 420 pages
...measure of the angle aBC and the arc DE is the measure of the angle ABC. (H) The circumference of every **circle is supposed to be divided into 360 equal parts...degrees, each degree into 60 equal parts called minutes,** each minute into 60 equal parts called seconds. The angles are measured by the number of "egrees cut... | |
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