The scales of commerce and trade: ballancing betwixt the buyer and seller, artificer and manufacture, debitor and creditor, the most general questions, artificiall rules, and usefull conclusions incident to traffique: comprehended in two books. The first states the ponderates to equity and custome, all usuall rules, legall bargains and contracts, in wholesale ot [sic] retaile, with factorage, returnes, and exchanges of forraign coyn, of interest-money, both simple and compounded, with solutions from naturall and artificiall arithmetick. The second book treats of geometricall problems and arithmeticall solutions, in dimensions of lines, superficies and bodies, both solid and concave, viz. land, wainscot, hangings, board, timber, stone, gaging of casks, military propositions, merchants accounts by debitor and creditor; architectonice, or the art of building. / By Thomas Willsford Gent.

Definition of these figures, which in their several species are here propounded, and their dimensions required.

Solid bodies to be measured are considered in ge∣neral, whether they be Circular, Right or Oblique angled; and these particularly in respect of each superficies one to another, or in, relation to their sides and bases, and most of them comprehended by some one of these 5 species.

I. Cylinders are bodies long and round, equal at either end, right angled at their bases with their sides, whose length and circumference is contained under one superficies, as is the figure A B C D.

II. Squared or rectangled Solids are all such bo∣dies, whose sides are parallels one to another, and right angled with the basis at either end, as the fi∣gure E F. G H. I K L.

III. A Pyramid hath but one basis, which is usu∣ally right angled in the 4 sides, the foot alwayes acute-angled with each superficies, and terminated at the other end in puncto, as the figure M R S T.

IV. A Cone hath but one base, and that round, the other end is terminated in a point, as was the former, and the length is contained under one su∣perficies, as is the figure V W X Y Z.

V. Segments are parts of either of the two last, the lesser end being cut off, so making 2 square or 2 round unequal bases, one acute angled with the side, the other obtuse, as the figures N O R S T, or P R, or W X Y Z, &c.