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 |
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Page 46
... Proportional compasses . Triangular Compasses . Marquois's scales . Beam Compasses . Plotting scales . The pantagraph . Sliding Rule . joint be beyond regulate stiff en from it their us can be Hair into a passes groove and , b to be ...
... Proportional compasses . Triangular Compasses . Marquois's scales . Beam Compasses . Plotting scales . The pantagraph . Sliding Rule . joint be beyond regulate stiff en from it their us can be Hair into a passes groove and , b to be ...
Page 48
... PROPORTIONAL COMPASSES . - By means of this ingenious instrument drawings may be re repres areas , polyg Fig . 1 groov groov To appear until scales . • To set to will c then , the po oft of the enlarg To The 1 points prick thus ...
... PROPORTIONAL COMPASSES . - By means of this ingenious instrument drawings may be re repres areas , polyg Fig . 1 groov groov To appear until scales . • To set to will c then , the po oft of the enlarg To The 1 points prick thus ...
Page 50
... proportional ween two numbers , being the square root of their product , may be found by ltiplying the numbers together , and then taking the square root of the product the manner explained above . The numbers of the scale of solids are ...
... proportional ween two numbers , being the square root of their product , may be found by ltiplying the numbers together , and then taking the square root of the product the manner explained above . The numbers of the scale of solids are ...
Page 61
... proportional compasses be set in the proportion of the sine 90 ° on the line of sines to the radius of the prim- ve , one pair of points will give , reduced to this radius , the sines taken off by the other pair of points . The manner ...
... proportional compasses be set in the proportion of the sine 90 ° on the line of sines to the radius of the prim- ve , one pair of points will give , reduced to this radius , the sines taken off by the other pair of points . The manner ...
Page 64
... proportional to their real mag- nitude . Another and more exact method is , to make the meridian passing through the center of the map , and all the parallels of latitude , straight lines , as in the last method . Then all the degrees ...
... proportional to their real mag- nitude . Another and more exact method is , to make the meridian passing through the center of the map , and all the parallels of latitude , straight lines , as in the last method . Then all the degrees ...
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Common terms and phrases
26 Spruce St ABCD angle rib beam beam compasses bevel breadth Cast Iron circle circumference colatitude compasses copy cube root cubic feet depth describe the arc diagonal diameter divided draw the lines Drawn by L.D. edge Eighths elevation ellipsis extent will reach Figure floor frame Frustum girders given number gnomonic projection half hypothenuse inches Invented and Drawn jack-rafters joists L.D. Gould length in feet limb line of chords line of numbers line of sines Lith 26 Spruce MATHEMATICAL INSTRUMENTS meridian method of finding Multiply nail number of degrees number of equal paper perpendicular plane Plate polygon primary divisions proportional purlin quarter girt radius rafter represent right angles right line roof Rule screw secants Shows the method slider sliding soffit straight line STRENGTH OF MATERIALS stroke subdivision tangents thickness transverse distance triangle truss vernier scale weight