TABLE XI. Mean Monthly Pressures of Dry Air for every Two Hours, 1862. January Month. oh 2h 4h 6h 8h Ioh 12h 14h 16h 18h 20h 22h Means. in. in. in. in. in. in. in. in. in. in. in. in. 29401 393 410 424 426 428 423 413 401 387 393 404 29409 *648 in. March April May 633 626 634 650 655 664 661 653 649 642 653 652 *197 1 *501 *333 i *305 July August 335 324 313 329 349 366 371 366 371 360 349 352 367 364 364 376 392 402 407 411 406 402 377 385 September 440 426 421 437 463 481 475 471 470 482 471 458 October... 340 324 332 357 374 384 383 368 360 356 356 353 November. 529 522 529 552 564 570 570 565 558 555 564 561 December. 516 504 528 539 549 550 556 546 538 535 541 555 Means *357 553 *538 29.404 392 394 410 425 436 438 433 430 428 424 422 29420 *349 *388 *458 And the means under the different hours may be represented as usual by the formula Px = 29′420 + 0·020 Sin (x + 238° 3′) + 0·008 Sin (2x + 169°47′) + 0·002 Sin (3x + 161° 34′). In the Results for the year 1860, the corresponding formula was accidentally omitted. It is Px 29'349+0'018 Sin (x + 227° 13′)+0'008 Sin (2x + 182° 21') + 0.001 Sin (3x + 66°48′). TABLE XII. Mean Monthly Directions of the Wind for every Two Hours, derived from the Indications of the Anemograph, 1862. Month. Hours from Noon. January February March April May June July oh 2h 4h 6h 8h 10h 12h 14h 16h 18h 20h 22h 221 216 221 223 228 237 231 230 234 230 228 227 132 141 133 100 116 122 77 139 154 45 102 67 168 215 186 173 115 145 167 208 100 138 118 163 224 227 221 223 218 224 225 221 240 239 248 225 226 225 252 241 236 220 228 233 220 234 250 243 242 241 236 234 227 230 227 235 246 260 252 254 235 235 238 241 241 244 225 222 226 231 230 232 August 238 216 198 213 218 227 269 231 245 256 236 226 September... 31 359 12 51 78 291 69 7 49 20 78 95 October 240 234 232 228 217 223 223 223 218 216 222 226 November 24 2 8 9 15 327 229 249 295 287 253 281 December 251 255 249 246 241 246 242 243 238 241 239 244 Means 234 235 234 232 227 231 228 229 229 235 229 233 TABLE XIII. Mean Bi-Horary Velocities of the Wind for each Month, estimated in the Directions given in the preceding Table, 1862. Hours from Noon. Month. ob-2h. 2b-4h. 4h-6h, 6h-8h. 8h-10h. 10h-12h. 12h-14h. 14h-16h. 16h-18h. 18h-20h. 20h-22h. 22h-oh, TABLE XIV. Actual Mean Monthly Bi-Horary Velocities of the Wind in 1862. Velocities in the Bi-Horary Intervals. Month. Means. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. h. January March 25.6 22.7 21.4 20 2 23'4 22.0 Miles. Miles. Miles. Miles. Miles. Miles. Miles. Miles. Miles. Miles. Miles. Miles. Miles. 22.I 21.4 23.3 26.8 22.6 144 143 13'5 12.0 12.4 178 191 22.0 27.3 26.3 23.8 15'5 19'7 15.8 22.8 13'9 27.0 Means of Velocities. 24.83 23.88 2160 1975 1893 18.71 18:32 18:21 18:28 19:48 22 70 24 79 2080 Means 1194 1148 1039 0.950 0.910 0·900 0·881 0.876 0879 0937 1091 1192 1'000 Relative Velocities. The absolute and relative velocities for the whole year for any hour be represented respectively by Vx = 20·80+3'372 Sin (x + 90° 55′) + 1·093 Sin (2x + 114° 40′) + 0.149 Sin (3x + 220° 28′), and Vx=1+0'162 Sin (x + 90° 55') + 0·053 Sin (2x + 114° 40') + 0.007 Sin (3x + 220° 28′). |