8. A great circle of a sphere is any circle on its surface, whose centre is the same as the centre of the sphere. lts plane divides ... The plane qf a circle is the surface included within its circumference. ... The diameter if a sflllere is any straight line which passes through the centre, and is terminated both ways by the surface ofanbsp;...
|Title||:||A New Treatise on the Use of the Globes, and Practical Astronomy; Or a Comprehensive View of the System of the World. In Four Parts. ... The Whole Serving as an Introduction to the Higher Astronomy and Natural Philosophy, is Illustrated with a Variety of Important Notes, Useful Remarks, &c. and Each Problem with Several Examples. The Necessary Astronomical Instruments are Pointed Out, and the Most Useful Tables are Inserted in the Work. Designed for the Instruction of Youth, and Particularly Adapted to the United States. By J. Wallace, ..|