A Mathematical Manual: Or, Delightful Associate ... Pub. for the Contemplation and Diversion of Gentlemen, and Others, who are Mathematically Inclined

Front Cover
S. Illidge, 1728 - 246 pages

From inside the book

Other editions - View all

Common terms and phrases

Popular passages

Page 50 - Add 1 to the given year; divide the sum by 19, and the remainder is the golden number.
Page 5 - Meridians are great circles passing through the poles of the world, and cutting the equinoctial at right angles. They are also called hour circles ; and upon the terrestrial sphere, circles of longitude.
Page 3 - ... equal parts, or degrees, and since the earth turns on its axis once in 24 hours, 15 degrees of the equator will correspond with one hour of time, for 360 degrees being divided by 24 hours, will give 15. The earth...
Page 70 - Lines crofs the Diameter of the Circle from Hour to Hour. 4. Reckon the Time of the Moon's coming to the South in the Circumference of the Circle, and...
Page 208 - ... 1 in. 2 in. 3 in. 4, in. 5 in. 6in. 7 in. 8 in. 9 in. 10 in. 11 in.
Page 154 - So is the Tangent of half the Sum of the oppofite Angles...
Page 233 - Hypothenufe ab,* by taking it between your Compafles, and applying it to the fame Scale of equal Parts...

Bibliographic information