Part 54

=Picture Plane=, desc. 255 In Drawing, illus. 249, 250 In Perspective, illus. 258

=Pinion-Wheel=, desc. 201

=Piston Rod=, desc. 223

=Pitch Circle= in Gearing 200

=Pitch Line=, Drawing the 209 In Gearing 200

=Plan=, def. 47

=Plan of the Work= 21

=Plane=, in Perspective, def. 249

=Plane of the Picture=, def. 250

=Plane Surface=, def. 49

=Point=, def. 82

=Point of Sight=, in Perspective Drawing 251

=Points=, relating to Chalk Drawings 36 To be observed in Sketching 141-2 Useful Hints and 170, 239

=Polygon=, def. 47

=Polyhedron=, def. 48

=Postulate=, def. 83

=Pounce=, How to Use, desc. 170, 186

=Preface= 13

=Preparatory Practice= in Drawing 30

=Prism=, def. 49

=Problems=, def. 83 Geometrical 86

=Produce=, def. 49

=Profile=, def. 49

=Projection=, Backward, illus. 153-4 Def. 49 Cylindrical Outline, desc. 159 Cylindrical Surface, illus. 161 Forward desc. 152, illus. 155 Hexagon Nut, illus. 160 Marking Dimensions 150 Lines of Sight 150 Scaling and Measuring in 149 Sight-Lines, illus. 151 Sloping Surface, desc. 159 Spur-Wheel, desc. 162

=Projection Drawing=, desc. 148 Illus. 149, 151, 153, 154, 155, 157, 158, 160, 161, 163 Principles of 148 Spur-Wheel, illus. 163, 212

=Proportional Dividers=, illus. 120

=Proportions= of Teeth of Wheels 210

=Proposition=, def. 83