## The American House Carpenters' and Joiners' Assistant: Being a New and Easy System of Lines, Founded on Geometrical Principles, for Cutting Every Description of Joints, and for Framing the Most Difficult Roofs; to which is Added a Complete Treatise on Mathematical Instruments. Also, Mensuration, Tables of the Weights and Cohesive Strength of the Several Materials Used in the Construction of Buildings, &c |

### From inside the book

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Page 97

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**cubic feet**: or set the length on c against 10 on D , and against the quarter girt , measured in tenths of feet , on D will be found the ap- proximate content on c . The approximate content thus found is greater than the true content ... Page 98

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**cubic feet**. As the error of the result obtained with the rule may amount to theth part of the whole , the ... feet long . 10 8 80 Since X = 12 12 144 set 80 ̊on B , against 144 on A , and against 18 on a , will be found 10 on B , and ... Page 99

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**cubic feet**leaves 25**cubic feet**, the true content . Problem 10. To find the Content of a piece of square timber , which tapers from end to end . Set the length in feet upon c , against 12 upon D , and against half the sum in inches of ... Page 100

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**cubic feet**and 4.3**cubic feet**is 81.8**cubic feet**, the con- tent required . Example 2. - Required the content of a piece of unsquared timber of the same dimensions as in the preceding example , making allowance of 21 per cent . for ... Page 111

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**cubic feet**and inches . Example . Find the number of**cubic feet**, in a piece of timber 28 feet long , 11 inches wide , and 3 inches thick . in . 11 3 } the sides . 12 ( 33 2.9 ft . 12 ) 28 the length , Multiply 2.4 by 2.9 4.8 1.9.0 6.5 ...### Other editions - View all

### Common terms and phrases

26 Spruce St angle rib beam beam compasses bevel breadth Cast Iron circle circumference colatitude constructed copy cube root cubic feet depth describe the arc diagonal diameter divided draw the lines edge Eighths elevation ellipsis extent will reach Figure floor frame girders given line given number gnomonic projection half hypothenuse inches instrument Invented and Drawn jack-rafters Join joists length in feet limb line of chords line of numbers line of sines Lith 26 Spruce meridian method of finding multiplied nail number of degrees number of equal pencil perpendicular plane Plate polygon primary divisions proportional purlin quadrant quarter girt quotient radius regular polygons represent right angles right line roof rule Rule.-Multiply screw secants sector Shows the method slider sliding soffit square root straight line stroke subdivision tangents thickness transverse distance triangle truss vernier scale weight