Rare Books

A treatise on Gunter's scale, and the sliding rule : together with a description and use of the sector, protractor, plain scale, and line of chords, or, An easy method of finding the area of superfices, and of measuring boards, and of finding the solid contents of bodies, especially that of timber, by the sliding rule, and also of guaging casks, and round timber. To these are added several useful logarithmick tables, tables of latitude and departure, and a table of natural radii, not known to have been heretofore published: also a table of round, and square timber