Brass, representation of, by cross-hatching, 82.

Bread for rubbing out, 26.

Bristol board, use of rubber on, 26.

Brush-shading, 281.

Brushes, size and use of, 280.

Cam, a, and a lever arm in one piece on a shaft, a shoe sliding on the
line, and held against the cam face by the rod, to find the position
of the face of the shoe against the cam, 228.
a full stroke, method of drawing or marking out, 237-241.
designed to cut off steam at five-eighths of the piston stroke, 244-246.
heart, to draw, 75, 76.
object of using, instead of eccentric, 234.

Cam wrist plate, and cut-off mechanism, 301.

Cams, cut-off, employed instead of eccentrics on steamboats, examples in
drawing, 232.
finding the essential points of drawings of, 241-244.
necessary imperfections in the operations of, 247-249.
part played by the stroke of the engine in determining the conformation
of, 241.
three-fourths and seven-eighths, 246, 247.

Cap nut, to pencil in a, 143.

Cast iron, representation of, 277.
representation of by cross-hatching, 82.

Centre from which an arc of a circle has been struck, to find, 52.

Centre of a circle, 51.

Centre punch in which the flat sides run out upon a circle, the edges
forming curves, 150.

Chamfer circles of bolt heads, 120-123.
of Franklin Institute bolt head, 119.

Chord of an arc, 50.

Chuck plate with six slots, to draw, 131.

Circle, degrees of a, 52-55.
pencil and circle pen, use of, 43, 44.
pens, 37, 38.
that shall pass through any three given points, to draw, 51.
to divide into six divisions, 56, 57.

Circles, to divide with the triangle, 129.
for bolt heads, to draw, 128.
German instrument for drawing, 44, 45.
use of the instrument in forming, 42-45.

Circular arcs, Rankine's process for rectifying and subdividing, 210.

Circumference, 50.

Collar, a representation of, 96.

Coloring and shading, points to be observed in, 278.

Color, to maintain an even shade of, 278.

Colors, mixing, 278.

Condenser, independent, 288.

Cone, cylinder intersecting a, 186.

Connecting rod, 169, 295, 303.
drawing representing the motion
which a crank imparts to a, 249, 250.
end, 147.

Copper, representation of, 277.

Corner where the round stem meets the square under the head, 150.

Coupling rod, working drawings of a, 169.

Crank, drawing representing the motion which it imparts to a connecting
rod, 249.
p