## The American House Carpenters' and Joiners' Assistant1857 |

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### Common terms and phrases

acute angle angle rib beam beam compasses bevel binding joists breadth butt-joint cast iron ceiling joists chord line circle circumference compasses constructed copy cube root cubic feet depth in inches describe the arc diameter divided double floor draw the line edge elevation ellipsis extent will reach figure framed floor Frustum girders given line given number half height hip-rafters hypothenuse instrument intersection Invented and Drawn jack-rafters Join length in feet limb line of numbers line of sines Lith 26 Spruce logarithmic meridian method of finding mitering nail number of degrees paper parallel pencil perpendicular piece of timber Plate polygon primary divisions proportional purlin radius rafter raking moulding right angles roof rule Rule.-Multiply screw secants sector Shows the method side sliding Sliding Rule soffit square root straight line stroke subdivisions tangents thickness tracing point transverse distance triangle truss vernier scale

### Popular passages

Page 13 - ... with each other at F, and with the longer rulers at D and E, and, being equal in length to the portions AD and AE of the longer rulers, form with them an accurate parallelogram, ADFE, in every position of the instrument. Several ivory castors support the machine parallel to the paper, and allow it to move freely over it in all directions The arms, AB and DF, are graduated and marked...

Page 26 - Sometimes strong paste is used instead of glue ; but, as this takes a longer time to set, it is usual to wet the paper also on the upper surface to within an inch of the paste mark, care being taken not to rub or injure the surface in the process. The wetting of the paper in either case is...

Page 4 - All such regular polygons, whose number of sides will exactly divide 360 (the number of degrees into which all circles are supposed to be divided) without a remainder, may likewise be set off upon the circumference of a circle by the line of chords. Thus, take the radius of the circle between the compasses, and open the sector till that extent becomes the transverse distance between 60 and 60 upon the line of chords ; then having divided 360 by the required number of sides, the transverse distance...