Essentials Of Drafting

PREFACE The author believes that the highest grade work can be done by evening school men, and in an experience of many years has always found that they are ever ready to meet the most exacting requirements when satisfied that what they are receiving is really worth while. Appreciation of the helpful criticisms of Prof. Thos. E. French is here expressed. CARL L. SVENSEN COLWMBUOS, H IO, Sept. 1, 1917. xiv CONTENTS PAGE CHAPTER XIX SHADE LINE DRAWING .. S . .................. i . . . . . . . . . . . . . . . . . . . . 136 Shade Lines - System in Common Use - Surface Shading - Shading Screw Threads and Gears - Special Surface Representations - Patent Office Drawing. CHAPTER XX DRAWINQGU ESTIONPSR, OBLEM AN S D STUDIES .. . .................. 141