## 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 7

... contained by the line AC and EC , is called the angle ACE , or ECA . Fig . 9 . The circumference of every circle is supposed to be

... contained by the line AC and EC , is called the angle ACE , or ECA . Fig . 9 . The circumference of every circle is supposed to be

**divided**into 360 equal parts , called degrees , each degree into 60 minutes , and GEOMETRICAL DEFINITIONS . Page 17

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**divided**into the same number of parts as the interior of the plan . Through the points 1 , 2 , 3 , 4 , draw the lines 1d , 2c , 3f , 4g , parallel to ab , intersecting the lines 1 d , 2 e , & c . , in the points def , & c . Find the ... Page 52

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**divided**, and that those sciences will advance in proportion as these are less difficult in their use , and more perfect in the performance of their respective operations . ON SCALES .-- Scales of equal parts are used for measuring ... Page 53

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**divided**into three kinds ; simply**divided**scales , diagonal scales , and vernier scales . - Simply**divided**Scales . Simply**divided**scales consist of any extent of equal divi- sions , which are numbered 1 , 2 , 3 , & c . , beginning from ... Page 54

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**divided**scales . Draw the diagonal lines from the tenth subdivision below to the ninth above ; from the ninth below to the eighth above : and so on ; till we come to a line from the first below to the zero point above . Then , since ...### 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