Part 14

=Gearing=, desc. 199 Drawing desc. 162, illus. 163

=Gearing and Design= 197

=Gears=, A Train of, desc. 208 Speed of 208

=Gear-Wheels=, Spur, illus. 198

=Generated=, def. 45

=Geometric=, def. 45

=Geometrical Axioms= 84

=Geometrical Drawing=, desc. 81 Problems in 86

=Geometrical Signs= 84

=Geometry=, defs. 249 Elements of 81

=Gothic Letters=, illus. 173

=Grooved Friction Wheels=, desc. 201

=Ground-Plane= def. 249, 255, illus. 249

=Half-Tint=, def. 45

=Hand-Wheel=, illus. 77

=Hanger=, illus. 179

=Helical Wheel= desc. 199, illus. 207

=Hemisphere=, def. 45

=Heptagon=, def. 47

=Hexagon=, def. 47 To Construct a 95

=Hexagon-Head Bolt=, illus. 144

=Hexahedron=, def. 48

=Horizontal=, def. 45, 250

=Horizontal Line=, in Drawing, illus. 250 How to Draw 32 In Perspective 252

=Hypothesis=, def. 83

=Icosahedron=, def. 48

=India Ink=, desc. and illus. 131 Dish or Tile, illus. 131

=India Rubber Eraser=, illus. 132 Use of 240

=Ink=, Preparing, for Drawings, desc. 167 Test for Good, desc. 167

=Ink Eraser=, Steel, desc. and illus. 132

=Inking=, illus. 166, 169 Long Lines, illus. 170 Rules of Procedure 168 Short Work, illus. 169

“=Inking in=” Drawings, desc. 167 “Points,” etc. 239, 243 Patent Office Drawings 234

=Inscribe=, def. 45

=Instrumental=, def. 45

=Instruments= for Chalk-work, illus. 29

=Internal Gear=, desc. 201

=Internal-Gear Wheel=, illus. 207

=Introduction= 15

=Isosceles Triangle=, def. 50

=Lantern-Wheel=, desc. 201

=Lathe-Dog=, illus. 76

=Lemma=, def. 83

=Lettering=, Blow-Off Valve, illus. 175 Drawings, desc. 171

=Light=, and Sense of Seeing 254 Experiment with, illus. 255 Laws of 252

=Line=, def. 82 To Divide into Equal Parts 89

=Linear Perspective Drawing= 247

=Lines=, def. 45 Note 65 Parallel, def. 83

=Link Motion=, Stephenson’s, illus. 225

=Longitudinal=, def. 46

=Lucas, Theo.=, Acknowledgement 23, 266

=Marking Measurements= on Drawings 243

=Mechanical Drawing= 137, 247 Elevation 138 Examples 143 Procedure 141

=Minerva=, Free-hand Sketch of iii

=Miter-Wheel= desc. 199, 204, illus. 204

=Model=, def. 46

=Nonagon=, def. 47

=Numbering= Drawings, Office Rules for 194-5

=Numerals=, illus. 173

=Oblique=, def. 46

=Oblique Lines= How to Draw, 32, 58, illus. 59, 63

=Oblong=, def. 46

=Obtuse Angle=, def. 42

=Obtuse-Angled Triangle=, def. 50

=Octahedron=, def. 48

=Octagon=, def. 47 To Describe on a given straight line 95 To Inscribe in a circle 96

=Oil Can=, illus. 77

=Optic Nerve=, illus. 253

=Optics=, in Drawing, def. 252

=Outline Picture=, desc. 152

=Oval=, def. 46 How to Draw an 71

=Overall=, def. 46

=Paper=, Fastening Drawing on 184 Rule or Scale 242 Sensitized, desc. 188 The Right Side of 241

=Parallel=, def. 46

=Parallel Lines=, def. 83, 252 To Draw 88 In Perspective 251

=Parallel Perspective Drawing=, illus. 260 to 263

=Parallel Rule= desc. 115, illus. 114-5

=Parallelogram=, def. 47 To Construct 93

=Pasting Drawing Paper=, “Points” 243

=Patent Office Drawings= 235, illus. 236 Rules of Great Britain 236 Rules of U. S. 233

=Patterns=, def. 46 Numbering, from drawings 194

=Pedestal=, illus. 178-9

=Pen=, Hand holding, illus. 166, 169, 170

=Pencil=, Function of a 142 How to Cut, illus. 57 How to Hold, illus. 54, 59, 60 How to Use 56

=Pencil-Compasses=, desc. 143 How to Hold 143

=Penciling=, desc. and illus. 139 “Points” 143, 240

=Pencil Lines=, How to Make 119

=Pencils=, Sharpening Points of 143, 241

=Penknife=, illus. 52

=Pens=, Drawing, illus. 129 Lettering and Figuring, illus. 172

=Pentagon=, def. 47 To Inscribe in a circle 94

=Perimeter=, def. 47 Of a Polygon, def. 47

=Periphery of a Wheel=, def. 200

=Perpendicular=, def. 47, 252

=Perpendicular Lines=, How to Draw 31, 61, 62

=Perrott, Geo.=, Acknowledgement 23, 266

=Personal=, Note from the Author 266

=Perspective Drawing= def. 47, illus. 250 Definitions of Terms used in 249 Geometrical Terms used in 248 Of a Bridge, illus. 249 Scale or Approximate 257 Vanishing Point, illus. 251 Water Reflection, illus. 246

=Perspective=, Linear, def. 247

=Perspective Plane=, def. 250

=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

=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

=Screw-Thread=, U. S. Standard Gauge 280

=Scroll or Curve=, desc. 117 Universal Curve, illus. 134

=Secant of an Arc= 99

=Section=, def. 49 Drawing illus. 163, desc. 160

=Sectional=, def. 49

=Section-Liner=, illus. 116

=Section Lines= in Drawings 240

=Section-Lining=, Cast-iron, etc., illus. 182 Cog-Wheel, illus. 183

=Section-Lining Drawings= desc. 182, illus. 183 Wheel Hub, illus. 184

=Selecting Drawing Instruments= 103, 240

=Semi-Circle=, def. 43

=Sensitized Paper=, desc. 188

=Set-Square=, illus. 102, 114

=Shading Curves=, illus. 181

=Shading Drawings= 180

=Shadow=, def. 49

=Shadow Line=, def. 46

=Shadow Lines=, “Points” 241

=Sharpening Pencils= 57

=Shop Drawings=, Office Rules 192

=Sight=, Point of, in Perspective Drawing 252 Sense of 254

=Sight Lines= in Projection, illus. 157

=Sine= of an Arc 99

=Skew-Gearing=, desc. 203

=Sketch Books=, desc. 142 Office Practice 194

=Sketches=, details 142

=Sketch=, Free-hand, Advantage of 55

=Sketching= desc. 141, note 17 Points to be observed in 141-2

=Sloping Surface= in Projection desc. 159, illus. 166

=Solid=, def. 49, 83

=Solid Pattern=, def. 47

=Speed of Gears= 208

=Sphere=, def. 49

=Spiral Curve=, def. 44

=Spring Bows= illus. 122, 123, desc. 124

=Spur-Gear= desc. 201, illus. 211

=Spur Mortise-Wheel=, illus. 202

=Spur-Wheel=, desc. 199, 216 How to Draw 209 Illus. 198 Projection desc. 162, illus. 163 Teeth of cast-iron, desc. 202

=Square=, def. 48 To Convert into an Octagon 95 To Describe about a Circle 94 To Inscribe in a Circle 93

=Standards=, for U. S. 278 Office Rules for 193

=Steady Rest=, Scale, illus. 228

=Straight Line=, def. 46 To Draw a Perpendicular to a 86 Drawing Figures of 66-7-8 How to Draw a 57, 59 To Bisect a 86

=Steel=, Section-Lining, illus. 182

=Steel Gears=, Economy of 216

=Surface=, def. 49, 82

=Symbols=, representing Materials 193

=Table= of Areas of Circles 273-277 Bolts, Standard Sizes of 280 Circular Measure 272 Circumferences of Circles 273-277 Contents 24 Decimal Equivalents 269 Diameters of Circles 273-277 Land Measure 272 Metric Equivalents 270 Pipe, Standard Sizes of Welded 279 Roman Figures 272 Solid Measure 272 Wire Gauges 278 Useful for Draughtsmen 266-280

=Tangent= of an Arc, def. 99 To Draw a, to a Circle 91

=Tee-Iron=, illus. 75

=Tee-Square=, Adjustable, desc. and illus. 113 Desc. 112 How to Use, illus. 111, 147 Illus. 102, 112 Points about 242

=Teeth in Bevel Gears=, desc. 204