Stereometry: or, the art of gauging made easie by the help of a sliding-rule : which shews the area's of circles in gallons, and the square and cube-root of any number under 100000 by inspection; and is also very useful in the ready solution of many questions in arithmetick and geometry. Particularly in measuring of timber, board, stone, brick-work, paving, cieling, flooring, tyling, &c. The third edition, carefully corrected, and much enlarged. With an appendix of conick sections, in which the nature and original of several solids (frequently mentioned in books of gauging) is explained, and their magnitudes compared. By Tho. Everard, Esq;