## 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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**rules**here laid down , to the framing and connecting of timbers ; to the framing and constructing of roofs ; to the mitering of planes and irregular surfaces at any angle ; to the mitering of circles , and to finding the joints in every ... Page 43

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**rules**to finding the curvature of a circular elevation , standing over a straight plan . Front lines of the moulding are produced until they bisect a horizontal line drawn through the centre , from which the circular cornice was struck ... Page 46

... the following ; viz . , Whole and halves . Proportional compasses . Triangular Compasses . Marquois's scales . ( Beam Compasses . Plotting scales . The pantagraph . Sliding

... the following ; viz . , Whole and halves . Proportional compasses . Triangular Compasses . Marquois's scales . ( Beam Compasses . Plotting scales . The pantagraph . Sliding

**Rule**. ON DRAWING COMPASSES . - This instrument consists of two. Page 52

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**rule**equally with respect to both the points , so as not to be nearer to one point than the other . It is difficult also so to carry the needle , or pen , that it shall neither incline more to one side than the other of the**rule**; and ... Page 55

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**Rule**. To take off any number to three places of figures upon a diagonal scale . On the parallel indicated by the third figure , measure from the diagonal indicated by the second figure to the vertical indicated by the first . Vernier ...### 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