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The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Elements of Natural Philosophy: Arranged Under the Following Heads: Matter ... - Page 40
1808 - 272 pages

## The Description and Use of the Globes, and the Orrery: To which is Prefixed ...

Joseph Harris - Astronomical models - 1732 - 190 pages
...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...

## An essay on mechanical geometry, explanatory of a set of models

Benjamin Donne - 1796
...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...

## A Complete System of Practical Arithmetic, with Various Branches in the ...

William Taylor (teacher of the mathematics.) - Arithmetic - 1800 - 519 pages
...• half the diameter is called the Radius. 8. The circumference of every circle is divided into 360 equal parts called Degrees ; each degree into 60 equal parts, called Minutes ; and each minute into 60 equal parts, called Seconds, &c. Any part of the the circumference is called an...

## Modern Geography: A Description of the Empires, Kingdoms, States ..., Volume 1

John Pinkerton - Atlases - 1804
...called Meridians. Now all circles are supposed to be divided into 360 equal parts, called degrees; every degree into 60 equal parts, called minutes; and every minute into 60 equal parts, called Sfconefi; and degrees, minutes, and seconds, are denoted by these characters, °, ', "; thus 37°....

## A Treatise on Plane and Spherical Trigonometry: With Their Most Useful ...

John Bonnycastle - Trigonometry - 1806 - 419 pages
...legs, and having the angular point for its centre. Every circle is supposed to be divided into 360 equal parts, called degrees ; 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 Explained Upon Sir Isaac Newton's Principles: And Made Easy to ...

James Ferguson - Astronomy - 1809 - 533 pages
...called the perigee. — These points are directly opposite to each other. Astronomers divide each orbit into 12 equal parts called signs ; each sign into 30 equal parts, called degrees ; each degree into GO equal parts, called minutes ; and every minute into GO equal parts, called seconds. The distance...

## An Introduction to the Theory and Practice of Plane and Spherical ...

Thomas Keith - Navigation - 1810 - 420 pages
...measure of the angle ABC. (H) The circumference of every circle is supposed to be divided into 360 equal parts called 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...

## A New Treatise on the Use of the Globes, Or, A Philosophical View of the ...

Thomas Keith - Astronomy - 1811 - 346 pages
...14' 43" and its declination 80° "15' 44" north. \$ Every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts called minutes ; each minute into 60 equal parts called seconds, &c. ; a degree is, therefore, only a relative idea,...