s, 174.

Position, 102.

Potash, 116, 167.

Potash, prussiate, 113.

Potassium cyanide, 170.

Potassium nitrate, 167.

Pound, 145, 157, 180.

Power, 128, 129, 130, 131, 133, 134, 140, 158, 159, 186.

Power, horse, 139, 140.

Precision tools, 50.

Preliminary statement, 191.

Pressure, 134, 135, 137, 148, 152.

Prime mover, 134.

Printing telegraph, 155.

Prism, 92, 93.

Protractor, 108, 109.

Prussiate of potash, 113.

Pulley, 68, 70, 73, 128, 133, 140, 149, 150.

Pulsation, 153.

Pumice, 83.

Pumice stone, 110, 175.

Punch, 62, 63.

Punch, centering, 62.

Punch cutter, 24.

Putty, 175.

Q

Quadrant, 102, 103.

Quality, 157.

Quarter, 180.

Quartz, 182.

R

Racks, 73, 74.

Radius, 52.

Rake, 29, 30, 38, 42, 43,45.

Rainbow, 92.

Ratchet, 77.

Ratchet brace, 77.

Reciprocity, 82.

Reflected, 92.

Reflecting, 89.

Reflection, 88, 91.

Refraction, 92.

Resin, 176.

Resistance, 79, 82, 83.

Resonance, 89.

Rim, 96.

Ring, 96.

Rods, 180.

Rosemary, 166.

Royalty, 193.

Rubber, 84, 163.

Rule, 53.

Rule, key-seat, 53, 54.

Rust preventive, 175.

S

Saffro, 170.

Sal ammoniac, 119, 162, 165, 176, 185.

Salt, 165, 170, 183, 185.

Sandarac, 169, 176.

Saw, 26, 64, 76.

Saw, wabble, 76.

Scale, 100, 101.

Science, 157.

Scraper, 50, 51.

Scribe, 47, 53.

Scruples, 180.

Sealing wax, 176.

Section lining, 103, 104, 110.

Sense, 159.

Sesame oil, 176.

Shade, 96.

Shading, 96, 110.

Shaft, 68, 69, 70, 73, 74, 75.

Shaft coupling, 74.

Shaper, 26, 50, 51, 53.

Shellac, 163.

Side cutters, 30.

Sienna, 168.

Signals, 87.

Silicate, 168.

Silver, 82, 118, 164, 165, 180, 183.

Snow, 185.

Soap, 165, 172.

Soap spirits, 166.

Soda, sulphate, 172.

Sodium carbonate, 172.

Sodium silicate, 168.

Sodium sulphate, 172.

Solder, 118, 175.

Solder, hard, 118.

Solder, soft, 118.

Soldering, 116, 117, 119, 176.

Solids, 84.

Sonorous, 88.

Sound, 87.

Sounding-boards, 88.

Spanish white, 168.

Spectroscope, 90, 93, 161.

Spectrum, 93.

Speed, 43.

Spelter, 118.

Sphere, 97.

Spiral, 78.

Sponge, 83.

Spring, 72, 79, 176.

Square, 48, 61, 63.

Square combination, 24, 77, 81.

Starch, 162, 163, 164.

Steel, 39, 40, 42, 44, 63, 79, 113, 165, 168, 169, 170, 184.

Stethoscope, 90.

Stove polish, 174, 175.

Straight edge, 61.

Stylus, 90.

Sugar, 163.

Su