To the extent possible under law, the Text Creation Partnership has waived all copyright and related or neighboring rights to this keyboarded and encoded edition of the work described above, according to the terms of the CC0 1.0 Public Domain Dedication (http://creativecommons.org/publicdomain/zero/1.0/). This waiver does not extend to any page images or other supplementary files associated with this work, which may be protected by copyright or other license restrictions. Please go to http://www.textcreationpartnership.org/ for more information.
A Board ten Inches broad, and ten foot long; against 10 you see is 0.833, 〈 math 〉〈 math 〉 which multiplyed by 10, gives 8330; then taking off 3 Figures, there re∣mains 8, that is 8 foot and 33/100: But if you would measure this Board by the Line of Numbers, then set one point of your Compasses on 12, extend the other to the breadth in Inches, the same Extent will reach
from the length in feet, to the Content. For as 12 (the side of a superficial foot square) is to the breadth in inches, which here is 10; so is the length in feet (which in this Example is 10,) to the Content in feet and parts, which is 8 foot 33/100: Note this for a general Rule, that if the Breadth be less than 12 Inches, then must you turn the Compasses to the left hand on your Rule; and if more than 12, then turn your Compasses from the Length in feet to the Right hand.
Learn but to read your Line well, and this Rule, then may you measure any Board or Pain of Glass as easily as to tell ten, &c.