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TABLE VI.

Excess of the Mean Monthly Temperature of the Air at each Hour, above the Mean Monthly Temperature for the Day, for the Year 1862.

Hour. Jan. Feb. Mar. April. May. June. July. Aug. Sept. Oct. Nov. Dec.

h.

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O +16+21+ 3°1 + 40+ 4'6 +41 +47 +58 +57 + 3'9 +44 + 2.0 +19+2·8+ 3'6 +4°7 + 5'4 +44 +56 + 6·7 +64 +43 +55 +2.5 +19 +31 + 37 +51 +60 +49 +63 + 71+65 + 42 +57 +24 3+15+29 +34 +5°2 + 6·1 + 5′2 + 6·7 + 7·0 + 6·0 +36 + 50+ 19 4+10+24+ 2.8 +49 +56 +53 +64 +64 + 50+ 2.7 + 3'9 + 1.2 5+04+1°7 +2°1 + 4′3 +46 +47 +55 +54 + 3·8 + 1·6 + 2·8 +0.5 6 −0·1+ 1·0 +14 +31 +31 + 3'5 + 3'9 + 3′9+ 2'4 + 0.5+1.8 +01 −0·4+0.3 + 0·6 + 1·7 + 15 +19 +19 +2.2+1.0

7

8

9

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-0.6 -0°2
-0°7-05] -0.8

08-08

0.8 -I'I

-0.1

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- 1°3 — 1'4—17] -I'I — 1'5—15-03-03 1'4-20- -23-25-2.8-2.5-2.5- 1·7] — 1·1 | — - 0'4

· 1′9 — 2·6 — 3·1—3′3—36—33—31—1·8 -2.0 -0.6

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· 31—3·8 — 3·9-43-40-36—1·8—2.7-0.8

07-14-23-36 -45-46-50—47—4°01′9-3'10'9

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- 1·6 — 2·3 — 4·6— 5.6 5.7—6·3—6·1—4°7-23-32-0.8

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21

22

23

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-5.6 — 5·8 — 6·3 - 6·5—5·0—2·6-3.2-0.8 -22-48-50-51-5'7 — 6·5 — 5·0 — 27-33

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-2.2- -41-39-37-43 - 5'7-4'5-2.5-3'5—14 — 0·8 — 1·8 — 19—2·8—2.4-1.8-2.5 -42-34-20-34-1.6

2.2- —10—2·8-14 -1.8

-03-08-04 +0.4 + 0·8 + 1.9 + 1°3 + 0·2 + 0.3 +0.3

1'5-09 +03+02+0·8 + 1·9+ 2·3 +30 +2.7 +2.5+ 2.5 +1°7 + 0·4 + 0·1

+10+12 + 21+ 31+ 3'5 + 37 + 38 +44 +4°3 + 2·9 + 2·5 + 1.2

HYGROGRAPHIC RESULTS.

TABLE VII.

Mean Monthly Temperatures of Evaporation for every Two Hours, 1862.

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...

May

June

July

...

January 397 403 393 385 383 382 382 383 383 383 379 39′3
February.. 415 417 412 402 396 391 388 386 38.2 38.5 38.7 39'9
March 432 442 438 427 418 411 404 404 403 40°4 | 41°1 | 42·6
April 48.5 493 49'5 484 468 45'7 444 440 43'3 43'6 45'7 47.6
551 555 55 2 53'5 518 504 493 484 479 49'3517 535
55'9 561 564 552 531 512 504 493 48.6 505 528
57.6 58.3 58.6 569 548 530 521 512 503 523 | 543 55'9
August 569 574 571 55'9 543 532 519 508 502 511 53'9 55.8
September 562 56.5 560 544 529 514 507 502 500 500 523 54'7
October... 511 516 509 490 480 474 471 473 472 469 482 49'9
November. 400 406 398 38.5 372 363 355 348 346 346 347 36.8
December. 44'4 450 438 433 429 428 423 425 426 423 422 434

38.7

39'7

41-8

46.4

51-8

547 52.9

546

54'0

529

48.7

36.9

43°1

Means 49°18 49'71 49′30 48′04 46'79 45·82 45'09 4465 44′29 4482 46·13 47·84|| 46-82|

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The same remark is applicable to this table as to Tables I and IV; namely, that the mean results are not quite identical with those given in the preceding section.

Representing by the same general expression as before (page [38]) the mean monthly temperature of evaporation at any hour, we find the following values of the constants.

TABLE VIII.

Values of the Constants in the Periodical Expression for the Mean Monthly Diurnal Inequalities of the Hygrographic Results, for the Year 1862.

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TABLE IX.

Excess of the Mean Monthly Temperature of Evaporation at each Hour, above the Mean Monthly Temperature for the Day, for the Year 1862.

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2

3

6

7

+ 1·6+2·2 + 2·2 + 2·9 + 3·8 + 3'4 + 3'9 + 3′3 +12+19 +22 +30 + 3·7 + 3'6 + 4°1 + 3·3 4+0.8 + 15 + 1·9 + 3·9 + 3·3 + 3·5 +39 + 3′1 5 +0.2+ 1.0 + 15 + 2·7 + 2·7 +31 + 3·3 −0·2 +0.5 + 10 + 21+ 1·8 + 2·3 + 2·3 −0·5+0·2 +0.5 + 1·3 + 0·8, + 1.3

Hour. Jan. Feb. Mar. April. May. June. July. Aug. Sept. Oct. Nov. Dec.

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+13 +17 + 1·7 + 2·2 + 3·2 + 2·8 + 2·8 +34 +33 + 2.5 + 2·8 +1.5 +16+21+ 2·0 + 2·6 + 3·6 +31 + 3′4 + 3′2 + 3·6 + 2·8 +36 +1.8

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+36 + 2·8 +39 + 1'7

+ 3'4 + 2·4 + 3′5 + 1:3

+ 2·9' +18+2·9 +0.8

+ 2·6

+ 2·4 + 1·1 + 2′1 + 04

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20

21

— 0·5' — 0·9 — 1′3 — 1'7

-0.212

---

-24-2.6.

25

- 15

- 1.6

-2'0

1.5-0·6 — 0'4

15 12- - 0.6

-2.2- - 15

- 3·0 — 3'1, — 3'1 — 2'7 — 2°4 -1'4

·36 — 36 — 3'3 — 27 — 13 35.

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- 1·6-07

- 19 -0.8 -21-07

40403·8 — 3.0 — 1°4 — 22— - 0.6

-40

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-403'9 — 31—15-22- -0.5 35-35-36 - 31-15 -2'4-0'6 26-26-28 — 2·7 — 1°4 — 25-08

13-141·6 — 1·9 — 1'0

2.5-10

-21-
- o'9

— 0·7 — 0·9 — 0·6-08-02 +01-03-03-08 — 0.5
— 0·4 — 0·4 — 0·1 + 0·2 + 0·9 + 1·2 + 0·7 + 0·9 + 0·5 + 0·4

— 1°3 — 0 ̊5

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20

22

+01+03 +0.5 + 1·1 + 1.8 +20 + 15 + 1·8 + 1·8 + 1′2

23 +07 + 1 + 1 + 1·8 + 2·6 + 2·5 + 2·2 + 2·5 +27 +20

0.0+ 0.1 +1°5 + 0·9

TABLE X.

Mean Monthly Elasticity of Vapour for every Two Hours, 1862.

Month.

March

April

May

in.

4h 6h 8h 10h 12h 14h 16h 18h 20h 22h

in. in. in. in. in. in. in. in. in. in. in.
January 0225 228 221 216 217 220 217 219 219 217 214 223
February.. 237 235 230 225 225 221 220 219 215 220 221 228
238 256 254 249 247 244 240 241 238 240 245 251
285 292 296 291 288 283 270 273 264 264 277 286
374 373 367 351 347 336 330 320 316 326 354 361
June
387 386 389 376 362 344 339 331 321 337 356 369
July 398 403 405 390 380 368 359 352 343 359 377 376
August 365 366 360 358 359 355 347 334 331 346 377 371
September 376 376 373 367 361 340 342 339 338 339 359 371
October... 326 336 328 317 306 297 295 303 303 304 311 316
November. 220 224 226 217 210 204 200 195 191 192 193 202
December. 266 276 264 262 259 260 251 256 258 256 256 260

Means 0308 313 309 302 297 289 284 282 278 283 295 301

The means of the numbers under the different hours may be represented pretty accurately by the formula

Ex = 0'295+0016 Sin (x + 52°43′) + 0·002 Sin (2x + 90°) + 0·001 Sin (3x + 270°).

Subtracting the values of the Elasticity of Vapour given above from the corresponding numbers in Table I, we obtain the numbers in the following Table.

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