257

CHAPTER XIII.

EXAMPLES IN LINE-SHADING AND DRAWING FOR LINE-SHADED
ENGRAVINGS.

Arrangement of idle pulleys to guide bolts from one pulley to another;
representation of a cutting tool for a planing machine 264

Drawings for photo-engraving 267

Drawing for an engraver in wood; drawings for engravings by the wax
process 268

Engraving made by the wax process from a print from a wood engraving;
engravings of a boiler drilling machine 269

CHAPTER XIV.

SHADING AND COLORING DRAWINGS.

Coloring the journals of shafts; simple shading; drawing cast-iron,
wrought iron, steel and copper 277

Points to be observed in coloring and shading; colored drawings to be
glued around their edges to the drawing board; to maintain an even
shade of color; mixing colors 278

To graduate the depth of tint for a cylindrical surface 279

The size and use of brushes; light in shading; example for shading a
Medart pulley 280

Brush shading 281

To show by the shading that the surfaces are highly polished;
representation of an oil cup; representation of an iron planing
machine 282

Example in shading of Blake's patent direct acting steam pump 284

Example of shading an independent condenser 288

CHAPTER XV.

EXAMPLES OF ENGINE WORK.

Drawings of an automatic high speed engine; side and end views of the
engine; vertical section of the cylinder through the valve face 289

Valve motion; governor 292

Pillow box, block crank-pin, wheel and main journal 294

Side and edge view of the connecting rod 295

A two hundred horse power horizontal steam boiler for a stationary engine;
cross sectional view of the boiler shell 296

Side elevation, end view of the boiler, and setting 297

Working drawings of a one hundred horse power engine; plan and side
view of the bed plate, with the main bearing and guide bars; cross
sections of the bed p