The description and use of the carpenters-rule: together with the use of the line of numbers (inscribed thereon) in arithmetick and geometry. And the application thereof to the measuring of superficies and solids, gaging of vessels, military orders, interest and annuities: with tables of reduction, &c. : To which is added, the use of a (portable) geometrical sun-dial, with a nocturnal on the backside, for the exact and ready finding the hour of the day and night: and other mathematical conclusions. Also of a universal-dial for the use of seamen or others. With the use of a sliding or glasiers-rule and Mr. White's rule for solid measure. / Collected and fitted to the meanest capacity by J. Browne.

Example.

At 5 inches Diameter, and 30 foot long, you shall find 4 foot ½ an inch true measure, for the content required

But for very small pieces, set TD or round to the length, as before; then counting 1 foot on the right for 1 inch, and 6 inches for ½ an inch; on the left you shall have the answer or content required. But note as the right-side is diminished, so is the left, for one foot on the left is a 12th of 1 Inch of timber, whereof 12 makes a foot, or 1 long inch, a foot long,

and 1 inch square, and every inch on the left is 1 square inch; thus at 2 foot long, and ½ an inch diameter, it is 4 □ inches ¾ in content.

But for a great piece under a 1000 foot, set TD or diameter to 1. 2. or 3 foot, called 10. 20. or 30 foot: then right against the feet and inches diameter, you have a content augmen∣ted accordingly, as at 30 foot long, and 7 foot diameter, you have 1140 foot for the true content using TD.

But for very great pieces, as Brew∣ers Tuns and the like, as in the 3 Pro∣position of the 5 Chapter, you cannot work this without Compasses, and thus it is done, take the distance from the top 12 to TD, then set one point in one foot on the right, then slide the rule till the other point shall reach to the inches deep or long, reckoned as before in round measure, viz. 1 inch for 10 inches, 2 for 20, &c. on the left: then counting 2 foot on the right for 24 foot, &c. right against it on the left, you shall have the con∣tent

in feet. But this is much easier wrought thus.

Set 3 foot on the right side the gage point for a Barrel, to 36 the depth in inches of a Tun, on the left, then right against 11 for 6 inches, the half of 23 foot is 53 in Barrels ¼ the fourth part of 213, the content ac∣cording to 282 inches in a Gallon. Note, I count 3 foot on the left side for 30 inches, &c.