Native indiarubber, 9 Needle to erase ink lines, 11 North points, 69 Northings and southings, 87
Oak-graining, 32 Obtuse arch, to draw, 24 Ogee arch, to draw, 25 Orchards, to represent, 36 Outline of lakes, 30 ---- of ponds, 30 ---- of rivers, 30 Oval, to construct, the width being given, 18
Pantograph, 131 ----, methods of setting, 132 ----, tables for setting, 133, 134 ----, to use, 134 Paper, blacklead, 8 ----, carbonic, 8 ----, cartridge, 6 ----, continuous cartridge, 6 ----, drawing, 5 ----, ----, to join, 12 ----, ----, sizes of, 5 ----, glue for mounting, 6 ----, machine-made, 6 ----, sectional, 8 ----, stretching for drawing, 6 ----, tracing, 7 ----, ----, continuous, 7 ----, ----, preparation of, 7 ----, ----, sizes of, 7 ----, ----, to join, 13 ----, transfer, 8 ----, ----, preparation of, 129 ----, to join sheets of, 12 ----, to mount on stretchers, 13 ---- for competition drawings, 6 ---- for large plans, 6 Parabola, to draw, base and height being given, 21 Parallel and equidistant lines, to draw, 28 Parchment for drawings, 8 Parliamentary plans and sections, 100 ---- standing orders, 98 Paste, 14 Patent, drawings for specifications, 8 Pathways, 111 Pen, dotting or wheel, 31 Pencil marks, erasure of, 9 ---- leg of compasses, 2 Pencils, 4 ----, pointing, 4 ---- for field sketching, 115 Pentagon, to describe, on a given line, 20 Perpendicular, to erect a, 15 Plan of trees, 36 Plans, civil engineers’ and surveyors’, 96 ----, estate and town, 107 ----, large, paper for, 6 ----, mining, 106 ----, railway, 97 ----, parliamentary, 100 Plotting, 77 ---- angular surveys, 81 ---- contours, 90 ---- detail, 89 ---- sounded points in submerged districts, 90 ---- traverse reference lines, 84 ---- vertical sections, 92 Pointing pencils, 4 Points of compasses, 2 Ponds, outline of, 30 Position of drawing table, 2 ---- of ink slab or saucer when in use, 10 ---- of windows in drawing office, 1 Precautions to be taken to ensure cleanliness, 9 Preparation of colours for tinting, 40 ---- of ink for drawing, 9 ---- of stretchers, 13 ---- of tracing paper, 7 ---- of transfer paper, 129 Preserving drawings, rolled, 12
Quality of Indian ink, 9 ---- of instruments, 2 Quatrefoil, Gothic, to draw, 26