Line-shading, 77-90.
and drawing for line-shaded engravings, 264-276.
in perspective drawing of a pipe-threading stock and die, 85.
mechanical drawing made to look better and show more distinctly by, 82.
simplest form of, 82.

Lines and curves, 48-76.

Lines in pencilling, where to begin, 24, 25.

Lining pen, 22.

Lining pen, form of, 34-37.

Lining pen, use of with a T square, 45, 47.

Link introduced in the place of a roller, to find the amount of motion of
the rod, 226.
quick return, plotting out the motion of a shaper, 250-253.

Links, pencilling for, 145, 146.

Locomotive frame, 174.
spring, 169.

Machine screw, to draw, 112, 113.

Main journal, 294.

Marking dimensions, 91-93.

Measuring rules, draughtsman's, 33.

Mechanical motions, plotting, 223-263.

Motion an eccentric will give to its rod, to find, 223.
a shaper link, quick return, plotting out, 250-253.
imparted in a straight line to a rod, attached to an eccentric strap, to
find the amount of, 229-231.
which a crank imparts to a connecting rod, 249, 250.

Motions, plotting mechanical, 223-263.

Moulding cutter, finding the curves for, 257-263.

Niles' horizontal tool work boring mill, feed motion of a, 209.

Nonagon, a, 62.

Nut, a representation of the shade line on, 84.
cap, to pencil in a, 145.
to show the thread depth in the top or end view of a, 166.

Nuts' and bolts, dimensions of United States Standard, 117.

Nuts and polygons, examples in, 112-151.

Octagon, a, 62, 63.

Oil cup, representation of, 282, 284.

Outline views, 97, 98.

Oval gearing, construction of, 210.

Paper cutter, the form of the end of, 25.
rules or scales, 32.

Parabola, to draw by lines, 74, 75.
to draw mechanically, 73, 74.

Parallel lines, 49.

Parallelogram, 59, 60.

Parchment, use of India ink on, 32.

Pen, German, regulated to draw lines of various breadths, 84, 85.
lining, form of, 34-37.

Pen point, forming the, 39, 40.
form of recently introduced, 39.

Pen points, oil-stoning, 36.

Pen, with sapphire points, 85.

Pens, circle, 37, 38.
used in drawing, 22.

Pencil holders for sticks of lead, 24.
lines in drawing, 23.
sharpening for fine work, 24.

Pencilling for a link, having the hubs on one side only, 145.
in a cap nut, 145.

Penknife and rubber scratching out, 25.

Pentagon, a, 62, 63.

Perimeter, the, 50.

Periphery, 50.

Perpendicular line, 49.