Part 55

=Protractor=, desc. 128

=Pulley and Friction Clutch=, illus. 224

=Punching Press= illus. 222, desc. 223

=Quadrant=, def. 49

=Quadrilateral=, def. 47

=Quadrisect=, def. 49

=Rack and Pinion=, desc. 205

=Radius of a Circle= 43

=Reading Working Drawings=, desc. 229

=Rectangle=, def. 48 To Construct a 92

=Reproducing Drawings=, desc. 186

=Reverse Curve=, def. 44

=Rhomboid=, def. 48

=Rhombus=, def. 48

=Right-Angle=, def. 42 Triangle, def. 50

=Robinson, A. W., M. E.=, note, Office Rules 191

=Rolling-Circle= in Gear-Wheel 200

=Rule=, Area of a Circle, To find the 271 Circumference of a Circle, To find the 271 Cylinder, To find the contents of a 271 Diameter of a Circle, To find the 271 Illus. 82 Inscribed Square, To find side of an 271 Parallelogram, To find the area of a 271 Pyramid or Cone, To find the contents of a 271 Radius of a circle, To find the 271 Sphere, To find the contents of a 271 Square, To find the side of an equal 271 Trapezoid, To find the area of a 271 Triangle, To find the area of a 271 Two-foot desc. 127, 128, illus. 128 Wedge, To find the contents of a 271

=Rules= for Drawing Office 191 Wheels, To find proportions of 209

=Sand Paper=, Removing surface of paper 168

=Scale=, Drawing to, desc. 126

=Scale Drawings=, To read 230

=Scale=, Flat, illus. 127 Triangular, illus. 127

=Scalene Triangle=, def. 50

=Scale or Approximate Perspective= 257

=Scale Rule=, for Proportions of Teeth 214

=Scales=, Drawing, desc. 126

=Scholium=, def. 83