Cerium, 88 Cesspool, 124 Charcoal filter, 114 Chain stitch, 186 Cherry stoner, 161, 162 Check valve, 71, 183 Chimney, 18, 31, 33, 57, 59, 74, 75, 80, 93, 94, 111 Chloride of lime, 126 Choker, 192 Chopper, 162, 163 Churns, 165, 167, 235 Cistern, 114 Clamp, 138 Cleaning, 25, 35, 127, 172 Cleaning equipment, 147, 148, 149, 150, 152, 153 Clinkers, 76 Clock, 236 Clutch, 192 Coal, 20, 28, 66, 76 Coffee mill, 162 pot, 167, 168 Cog wheels, 165 Coils, 64, 78, 80 Coke, 222 Cold-process gasoline-gas, 29, 91, 145 Color and illumination, 84 Compressed-air pump, 113, 115, 117 Combustion, 16, 17, 23, 24, 58, 66, 74, 76, 77 Conductivity of materials, 156, 157, 158 Contraction of materials, 235 Cookers, 50, 51, 55, 56 Coolers, 105, 106, 108, 109 Copper, 158, 216, 236 Crank, 163 Cream separator, 178, 179 Cubic measure, 229 Cup, measuring, 227, 228 Current, electric, 42, 46, 80, 83, 86, 110, 143, 144, 215, 218, 232 Curtain roller, 185 Cylinder, 112, 113, 211 washer, 133 D Dampers, 16, 17, 18, 19, 20, 22, 58, 61, 66, 74, 75, 197, 198, 235, 236 Decomposition of sewage, 124, 125, 127 Degree, 233, 234 Dekagram, 226 Dekaliter, 228 Dekameter, 229 Dermax, 206 Density of liquids, 237 Direct current, 110 Direct lighting, 85 Dish-washer, 170, 171 Disinfectant, 126, 200 Distillate, 40, 218 Dolly washer, 134 Doors, 103, 183, 184, 185, 215 Drafts, 16, 17, 18, 19, 57, 58, 59, 74 Drain, 103, 104, 122, 138 Dram, 226, 228 Drip pipe, 102, 103 Drip sheet, 25 Dryer, 171, 176 Dry-cleaning equipment, 140 Dry-cell battery, 215, 216 Dulling of edges, 159, 163 Dumbwaiters, 183 Dust, 76, 78, 80, 148, 150 Dynamo, 215, 216 E Earthenware, 107, 156 Egg tester, 201 Electric appliances, 42, 44, 46, 81 heating, 42, 43, 80, 119 measurements, 43, 82, 230, 232 Electric motors, 217 Electricity, 215, 219 Electrolyte, 217 Enameled ware, 157 Engine, gasoline, 137, 212 Evaporation, 67, 105, 106, 140 Exhaust pipe, 212, 214 Expansion of materials, 108, 234, 235 tank, 66, 67, 120 valve, 70 Explosions, prevented, 25, 35, 37, 39, 69 utilized, 192, 214, 222 Extractor, 139 F Fahrenheit thermometer, 233, 234 Fan, 110, 148, 177 Fastener, door, 184 Faucet, 109, 114, 116, 119, 120, 122 Feed plate, 187, 188, 189, 207 Filament for lamp, 83 Filter, water, 114, 116, 168 Fire, 18, 19, 34, 41, 66, 75 Fireless cooker, 50, 51 Fireplace, 74, 75 Fire-pot, 20, 57, 58, 65, 76 Flame, 23, 35, 38 Flame, blue, 31, 38, 49, 96 illuminating, 77, 78, 88, 89, 93, 94 Flash point, 218 Flat-iron, 142 Float for flushing tank, 129, 130 Flue, 66, 77 Force pump, 113, 117, 119 Freezer, 166, 167 Freezing, 68, 112, 126, 166, 233 Friction, danger from, 140