## 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 46

... the following ; viz . , Whole and halves . Proportional compasses . Triangular Compasses . Marquois's scales . (

... 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 57

... compasses upon c , and transfer the divisions in the quadrant CD , to the right line CD , and we shall have a scale ...

... compasses upon c , and transfer the divisions in the quadrant CD , to the right line CD , and we shall have a scale ...

**beam compasses**hereafter described , and corrected by the aid of Bird's vernier scale .. Set one foot of the compass ... Page 67

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**beam compasses**, by which it is to be divided , bisect it , and figure it 1 at the commencement on the left hand , 1 again in the middle , and 10 at the end . The half line , then , is taken for unity , or the logarithm of 10 , and ... Page 87

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**BEAM COMPASSES**. - Fig . 44 represents this instrument , which consists of a beam AA , of any length required , generally made of well - seasoned mahogany . Upon its face is inlaid throughout its whole length a slip of holly or boxwood ... Page 88

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**beam compasses**have the box c , also furnished with a tangent or slow motion screw , by which the setting of the points or divisions may be performed with the utmost precision . Lastly , apply the points to a similar detached scale ...### 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