## 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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**two**oblique lines , and is either less or greater than a right angle , Fig . 12 ...**equal**, Fig . 14 . 21. An isosceles triangle is that which has**two**sides ...**number**of their sides or angles , thus : - 37. A pentagon is a polygon of ... Page 12

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**number of equal**parts , as five , for example . Through the points of division , 1 , 2 , 3 , 4 in AE , draw the lines B1 , B2 , etc .; and through the points of division 1 , 2 , 3 , 4 in AF , draw the lines 1D , 2D , etc. Through the ... Page 13

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**equal number**of parts ; draw the lines 1 , 2 , 3 , etc. , at A , to the line 7 , 10 , in B. Draw lines perpendicular to 7 , 10 , from the points 1 , 2 , 3 , etc. , on the line 7 , 10 , and**equal**in length to 1.1 , 2.2 , 3.3 , at A ... Page 14

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**equal**to the corresponding ones , gh , and through the points thus found ...**number**of parts . Take in the compass the distance , cd , and with one leg ...**equal**to 11 on the plan ; c4 ,**equal**to 2.2 , 2.2**equal**to ba , and 3.3 on the ... Page 15

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**number**of parts as 1 , 2 , 3 , & c . , and from the points , 1 , 2 , 3 , & c . , & c . , cutting the diagonal , ik , in the points 1mn , & c . draw 1q , mr , ns , & c . ,**equal**in length to c1 , d2 , e3 , & c . , and through the points ...### 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