MEASUREMENT OF WATER PRESSURE.
In reference to the [table on the next page], it may be well to say that it has two uses; by it when the “head” is known the pressure can be ascertained to a fraction, thus, Ex. 1, If the head is 140 feet, then the pressure is 60·64 pounds per square inch. Again, Ex. 2, If the pressure is 15·16 per square inch, then the head is 35 feet.
Inside. [(See Page 115.)] Outside.
PRESSURE OF WATER.
The pressure of water in pounds per square inch for every foot in height to 300 feet; and then by intervals, to 1000 feet head· By this table, from the pounds pressure per square inch, the feet head is readily obtained; and vice versa.
| Feet Head. | Pressure per square inch. |
|---|---|
| 1 | 0·43 |
| 2 | 0·86 |
| 3 | 1·30 |
| 4 | 1·73 |
| 5 | 2·16 |
| 6 | 2·59 |
| 7 | 3·03 |
| 8 | 3·46 |
| 9 | 3·89 |
| 10 | 4·33 |
| 11 | 4·76 |
| 12 | 5·20 |
| 13 | 5·63 |
| 14 | 6·06 |
| 15 | 6·49 |
| 16 | 6·93 |
| 17 | 7·36 |
| 18 | 7·79 |
| 19 | 8·22 |
| 20 | 8·66 |
| 21 | 9·09 |
| 22 | 9·53 |
| 23 | 9·96 |
| 24 | 10·39 |
| 25 | 10·82 |
| 26 | 11·26 |
| 27 | 11·69 |
| 28 | 12·12 |
| 29 | 12·55 |
| 30 | 12·99 |
| 31 | 13·42 |
| 32 | 13·86 |
| 33 | 14·29 |
| 34 | 14·72 |
| 35 | 15·16 |
| 36 | 15·59 |
| 37 | 16·02 |
| 38 | 16·45 |
| 39 | 16·89 |
| 40 | 17·32 |
| 41 | 17·75 |
| 42 | 18·19 |
| 43 | 18·62 |
| 44 | 19·05 |
| 45 | 19·49 |
| 46 | 19·92 |
| 47 | 20·35 |
| 48 | 20·79 |
| 49 | 21·22 |
| 50 | 21·65 |
| 51 | 22·09 |
| 52 | 22·52 |
| 53 | 22·95 |
| 54 | 23·39 |
| 55 | 23·82 |
| 56 | 24·26 |
| 57 | 24·69 |
| 58 | 25·12 |
| 59 | 25·55 |
| 60 | 25·99 |
| 61 | 26·42 |
| 62 | 26·85 |
| 63 | 27·29 |
| 64 | 27·72 |
| 65 | 28·15 |
| 66 | 28·58 |
| 67 | 29·02 |
| 68 | 29·45 |
| 69 | 29·88 |
| 70 | 30·32 |
| 71 | 30·75 |
| 72 | 31·18 |
| 73 | 31·62 |
| 74 | 32·05 |
| 75 | 32·48 |
| 76 | 32·92 |
| 77 | 33·35 |
| 78 | 33·78 |
| 79 | 34·21 |
| 80 | 34·65 |
| 81 | 35·08 |
| 82 | 35·52 |
| 83 | 35·95 |
| 84 | 36·39 |
| 85 | 36·82 |
| 86 | 37·25 |
| 87 | 37·68 |
| 88 | 38·12 |
| 89 | 38·55 |
| 90 | 38·98 |
| 91 | 39·42 |
| 92 | 39·85 |
| 93 | 40·28 |
| 94 | 40·72 |
| 95 | 41·15 |
| 96 | 41·58 |
| 97 | 42·01 |
| 98 | 42·45 |
| 99 | 42·88 |
| 100 | 43·31 |
| 101 | 43·75 |
| 102 | 44·18 |
| 103 | 44·61 |
| 104 | 45·05 |
| 105 | 45·48 |
| 106 | 45·91 |
| 107 | 46·34 |
| 108 | 46·78 |
| 109 | 47·21 |
| 110 | 47·64 |
| 111 | 48·08 |
| 112 | 48·51 |
| 113 | 48·94 |
| 114 | 49·38 |
| 115 | 49·81 |
| 116 | 50·24 |
| 117 | 50·68 |
| 118 | 51·11 |
| 119 | 51·54 |
| 120 | 51·98 |
| 121 | 52·41 |
| 122 | 52·84 |
| 123 | 53·28 |
| 124 | 53·71 |
| 125 | 54·15 |
| 126 | 54·58 |
| 127 | 55·01 |
| 128 | 55·44 |
| 129 | 55·88 |
| 130 | 56·31 |
| 131 | 56·74 |
| 132 | 57·18 |
| 133 | 57·61 |
| 134 | 58·04 |
| 135 | 58·48 |
| 136 | 58·91 |
| 137 | 59·34 |
| 138 | 59·77 |
| 139 | 60·21 |
| 140 | 60·64 |
| 141 | 61·07 |
| 142 | 61·51 |
| 143 | 61·94 |
| 144 | 62·37 |
| 145 | 62·81 |
| 146 | 63·24 |
| 147 | 63·67 |
| 148 | 64·10 |
| 149 | 64·54 |
| 150 | 64·97 |
| 151 | 65·40 |
| 152 | 65·84 |
| 153 | 66·27 |
| 154 | 66·70 |
| 155 | 67·14 |
| 156 | 67·57 |
| 157 | 68·00 |
| 158 | 68·43 |
| 159 | 68·87 |
| 160 | 69·31 |
| 161 | 69·74 |
| 162 | 70·17 |
| 163 | 70·61 |
| 164 | 71·04 |
| 165 | 71·47 |
| 166 | 71·91 |
| 167 | 72·34 |
| 168 | 72·77 |
| 169 | 73·20 |
| 170 | 73·64 |
| 171 | 74·07 |
| 172 | 74·50 |
| 173 | 74·94 |
| 174 | 75·37 |
| 175 | 75·80 |
| 176 | 76·23 |
| 177 | 76·67 |
| 178 | 77·10 |
| 179 | 77·53 |
| 180 | 77·97 |
| 181 | 78·40 |
| 182 | 78·84 |
| 183 | 79·27 |
| 184 | 79·70 |
| 185 | 80·14 |
| 186 | 80·57 |
| 187 | 81·00 |
| 188 | 81·43 |
| 189 | 81·87 |
| 190 | 82·30 |
| 191 | 82·73 |
| 192 | 83·17 |
| 193 | 83·60 |
| 194 | 84·03 |
| 195 | 84·47 |
| 196 | 84·90 |
| 197 | 85·33 |
| 198 | 85·76 |
| 199 | 86·20 |
| 200 | 86·63 |
| 201 | 87·07 |
| 202 | 87·50 |
| 203 | 87·93 |
| 204 | 88·36 |
| 205 | 88·80 |
| 206 | 89·23 |
| 207 | 89·66 |
| 208 | 90·10 |
| 209 | 90·53 |
| 210 | 90·96 |
| 211 | 91·39 |
| 212 | 91·83 |
| 213 | 92·26 |
| 214 | 92·69 |
| 215 | 93·13 |
| 216 | 93·56 |
| 217 | 93·99 |
| 218 | 94·43 |
| 219 | 94·86 |
| 220 | 95·30 |
| 221 | 95·73 |
| 222 | 96·16 |
| 223 | 96·60 |
| 224 | 97·03 |
| 225 | 97·46 |
| 226 | 97·90 |
| 227 | 98·33 |
| 228 | 98·76 |
| 229 | 99·20 |
| 230 | 99·63 |
| 231 | 100·06 |
| 232 | 100·49 |
| 233 | 100·93 |
| 234 | 101·36 |
| 235 | 101·79 |
| 236 | 102·23 |
| 237 | 102·66 |
| 238 | 103·09 |
| 239 | 103·53 |
| 240 | 103·96 |
| 241 | 104·39 |
| 242 | 104·83 |
| 243 | 105·26 |
| 244 | 105·69 |
| 245 | 106·13 |
| 246 | 106·56 |
| 247 | 106·99 |
| 248 | 107·43 |
| 249 | 107·86 |
| 250 | 108·29 |
| 251 | 108·73 |
| 252 | 109·16 |
| 253 | 109·59 |
| 254 | 110·03 |
| 255 | 110·46 |
| 256 | 110·89 |
| 257 | 111·32 |
| 258 | 111·76 |
| 259 | 112·19 |
| 260 | 112·62 |
| 261 | 113·06 |
| 262 | 113·49 |
| 263 | 113·92 |
| 264 | 114·36 |
| 265 | 114·79 |
| 266 | 115·22 |
| 267 | 115·66 |
| 268 | 116·09 |
| 269 | 116·52 |
| 270 | 116·96 |
| 271 | 117·39 |
| 272 | 117·82 |
| 273 | 118·26 |
| 274 | 118·69 |
| 275 | 119·12 |
| 276 | 119·56 |
| 277 | 119·99 |
| 278 | 120·42 |
| 279 | 120·85 |
| 280 | 121·29 |
| 281 | 121·72 |
| 282 | 122·15 |
| 283 | 122·59 |
| 284 | 123·02 |
| 285 | 123·45 |
| 286 | 123·89 |
| 287 | 124·32 |
| 288 | 124·75 |
| 289 | 125·18 |
| 290 | 125·62 |
| 291 | 126·05 |
| 292 | 126·48 |
| 293 | 126·92 |
| 294 | 127·35 |
| 295 | 127·78 |
| 296 | 128·22 |
| 297 | 128·65 |
| 298 | 129·08 |
| 299 | 129·51 |
| 300 | 129·95 |
| 310 | 134·28 |
| 320 | 138·62 |
| 330 | 142·95 |
| 340 | 147·28 |
| 350 | 151·61 |
| 360 | 155·94 |
| 370 | 160·27 |
| 380 | 164·61 |
| 390 | 168·94 |
| 400 | 173·27 |
| 500 | 216·58 |
| 600 | 259·90 |
| 700 | 303·22 |
| 800 | 346·54 |
| 900 | 389·86 |
| 1000 | 433·18 |