Smithsonian Meteorological Tables [4 ed.]

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At Cornell University Ithaca,

N. Y.

Library

QC

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[based

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?mwi

OF

OEPT. OF yEIEOEOLBeY

SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME

69.

NUMBER

1

SMITHSONIAN

METEOROLOGICAL TABLES [based on guyot's meteorological

and physical tables]

FOURTH REVISED EDITION (Corrected to January, 1918)

^

s\n

which B„

in

is

all

£)

With

B.

g g the correction

In general, sufficient accuracy will be attained correction for a station once for

—

is


+ C = 0.002640 cos 24> — 0.000007 cos^ 20 + ife

0.000045

R = r]

=

6367324 meters. (A. R. Clarke: Geodesy,

=0.002396.

R

8°,

Oxford, 1880.)

(Ferrel: Report Chief Signal Officer,

1885, pt. 2,

pp. 17 and 393.) TABLES

S1

,

S2, 53, 64, 66.

THE DETERMINATION OF HEIGHTS BY THE BAROMETER. Tables 51 52, 53, 54, 55. ,

English Measures.

Since a barometric determination of the height will rarely be made at a place where gi is known, the discussion which follows will be confined to the second form of the barometric formula developed in the preceding section (see

page xxxix). For convenience form

in

computing heights

it is

arranged

in the following

Z = KilogBo-logB)

+ ad) + (l + kcOS2 Z + 2h 1 + R

(i (i

1 s

ff)

k'

COS^2+C)

(l

Comptes Rendus, Quatrieme Conference Generale Poids et Mesures, 1907, ^ Lehrbuch der Meteorologie, dritte Auflage, Leduc I.e.

+ v)

pp. 60-61. 191S.

s.

5.

INTRODUCTION.

xlii in

which

K

B^ —

(log

log

B)

is

an approximate value of Z and the factors depending respectively on the air

in the brackets are correction factors

temperature, the humidity, the variation of gravity with latitude, the its effect on the weight of mercury in

variation of gravity with altitude in

the barometer, and the variation of gravity with altitude in its effect on the weight of the air. With the constants already given, the formula becomes

measures:

in English

Z (feet)

= 60368

1

(log J5o-log5)

"[1+0.002039

-

{e

32°)]

(I+/3) (l

+ 0.002640 cos 2 — 0.000007 COS^ 2 + 0.000045) (l + 0.00239)

+ 0.000007 co^' 2

its

acceleration at

Table 84.

RELATIVE ACCELERATION OF CRAVtTY AT DIFFERENT LATITUDES. Ratio of the acceleration of gravity at sea level for each lo' of latitude, to latitude 45°.

.

its

acceleration at

Table 85.

LENGTH OF ONt DEGREE OF THE MERIDIAN AT DIFFERENT LATITUDES.

Latitude.

Table 86.

LENGTH OF ONE DEGREE OF THE PARALLEL- AT DIFFERENT LATITUDES.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of tlie

Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of tlie

Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of tlie

Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of

ihe Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of

the Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of llie

Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of tlie

Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of the Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES. LATITUDE NORTH.

Declination of

the Sun.

60° h.

-8

0'

62°

61°

m.

h.

m.

10 40

1037

20

1045 1050

10 42

20 O

40 20

O

-3 -3 -3 -2 —2

1047

1055 1059 11 4

1052 1056

II 8 II 13

II 6 II II II 16

II

18

11

I

70°

9 43

936

928

919

950

9 43

927

3 9

9 57 10 4

950

9 35 9 43

9 57

950

10 15 10 22 10 28

10 10 10 i5

1023

10 4 10 II 10 18

9 57 10 5 10 12

1034

10 29

1025

1047 1053

1038 1044 1050

10 40 10 46

1036

10 31

10 19 10 26

10 42

1038

1034

10 14 10 21 10 29

10 49

I

1052 1058

10 41 10 48

1036 1044

7

11

11

I

1045 1052 1058

1055

10 51

11 5 II II II 18

11 2 II 9 II 16

1059

1025 10 31

10 20 10 26

10 40

1036

1032

1045 1050 1056

10 41

033 038 043 049 054 059

69^

h. jn.

1034

1032

10 13 10 18

68°

m.

h,

10 29

103s

40

m.

023 028 1023

o 17

7

67°

950 956

h.

10 2 10 8 10 14

10 22 10 27

6

m.

10 8 10 13 10 19

10 26 10 31

20 o

10

956

ID 12

"7 -7

h.

66°

65°

64°

2

10 17

40

O

m.

h.

10 21

7

40

63°

10

10 10

I

1058

1055

I

9

I

14

II 7 II 12

11 4 II 10

11 II

II 17 II 22 II 28

II 15

II 13

II 10

II

20 II 26

II 19 II 24

II 16 II 22

II 8 II 14 II 20

30 36

II 28 II 34 II 40

II 27 II 33 II 40

11 25 II 32 II 38

II 23 II 30 II 37

II 21 II 28 II 35

II 46 II 52 11 58

II 45 II 52 11 58

II 44 II 51 11 58

II 43 II 50 11 58

12 5 12 12

12 5 12 12

1225

12 19 la 26

12 19 12 27

4

1055

II 21 II 26 II 31

I

19

II 27 II 32

I

24 29

—2 —

II 37 II 41 II 46

II 35 II 40 II 45

134 II 33 139 1138 144 II 43

II 31 II 37 II 43

II

20 O

I

40

II

—

II 50

I

20

II 55 11 59

1155

II

54 11 59

II 48 II 53 11 59

II 47 II 53

11 59

149 154 159

II 49

11 59

II 45 II 52 11 58

40

12 12

2 2

4 9

12 4 12 10

12 4 12 10

12 4 12 10

12 4 12 10

12 4 12 II

12

20

12 12

— -0 —O I

O

4 9

4 9

6

11

II 22

50

10

4

20

40

951 958

I

40 o

9 35 9 43

1

II

II 41

5

12. II

11 6 II 13

12 13 12 18 12 22

12 14 12 19 12 23

2 14 2 19 2 24'

12 15 12 20 12 25

12 15 12 20 12 26

12 16 12 22 12 27

12 16 12 22 12 28

12 17 12 23 12 29

12 18

12 31

12 33

1234

12 27 12 32

12 28

2 29

12 32

12 36 12 42

1238 1244 1251

12 41

234 239

1233 1234 1239 12 40 1244 12 46

12 40

1233 1238

1231 1236

1247 1254

1249 1256

12 41 12 46 12 50

1243 1247

13 I 13 8 13 15

13 4 13 II 13 19

1255

1257

244 12 46 12 48 1250 12 52 1255 1258 249 1252 1253 12 56 1259 13 I 13 4 254 1257 1259 13 2 13 5 13 7 13 II 259 13 2 13 5 13 8 13 II 13 14 13 17

20 40

o 13 4

13 13

20 40

-fO 20 o 40 20 40 20

40

20

40 20

40

1237

12 52

12 41

1237 1243

1249

13 22

13 25

1327

1329 1336

1334

1323

13 24 13 31

13 31

1329 1335 13 41

1343 1350 1358

1349 1356

1337

1335 1338 1340 1345 1345 1352

13 27

330 1334 1338 1343 1347 1353 1358

1332 1337

3 35

14 5 14 12 14 19

14 II 14 19

1342 1347 1352

346 1350 1355 351 1356 14 I 356 14 I 14 7

14 14 7 14 13

14 6 14 12 14 18

14 26

1435 1443

14 19

1425

1424

14 31

13 10 13 16

13 13 13 19

13 17

13 20

3 10

13 7 13 13

13 12 13 17 13 22

315

13 18

1325

20

1323

13 22 13 27

3 25

13 29

1332

13 23

1328 1333

2

3

7

13 9 13 14 13 19

13

1338 1343 1347

3

5

341

1340 1344 1349 1354 1359 1345 1350 1355 14 o 14 6 I

7

7 4 12

14 7 14 13 14 18

14 12 14 18

14 12

417

1423

1430 1437

1352 1357

1357

4

20

2

4

40

14

2

14 14

14

7

I

Smithsonian Tables.

211

1425

14 5 14 12

13 41

14

4

1427

14 13 14 19 14 26

14 19 14 26

1432 14 31 1439 1438 1446

1440 1448 1455

1449 1457 4

15 7 15 15

2

15 12

^523

1445

1452

1433

15

1434 1442

15

14 51

1459

Table 87.

DURATION OF SONSHINE AT DIFFERENT LATITUDES.

Declination of tlie

Sun.

Table 87.

DURATION OF SUNSHINE AT DIFFERENT LATITUDES. I,ATITUDE NORTH. Declination of

the Sun.

60°

h.

+

m,

0' 8 20 8 40

9

4 22

9 20 9 40

427 432

10 10 20 10 40

4 37

11

8°

II 11

h.

m.

62°

b.

m.

m.

428

4 35

427 432 438

4 34 4 39 4 45

450 456

4 47

4 43 4 49 4 54

452

4 59

4 57

5

5 7 5 13

5

5

2

519 525

12 12 20 12 40

5

8

518

516 521 527

13 13 20 13 40

5 23 5 29

5 33 5 39

14 14 20 14 40

540 546 551

15 15 20 15 40

5 57 6 2

6 8 6 14

8

6 20

16 16 20 16 40

6 14 6 20

17 17 20 17 40

632 638 645 651 658

626 632 639 645 652 658 7 5 7 12 7 19

7 20 7 28

26 7 33

5 13

5 35

6

626

7

4

531

536 542 548

458

15 6 15 13 15 19

5 15 5 22

528

1525 1532 1539

1535 1543 1550

516 1525

5 35

1546

1558 16 5 16 13

5 4 5 10 5 22

5

9

1531

541

15 53

528 1538

548

16

1544 540 1550 546 1557

5 55 6 2

16 7 16 15 16 22

5 34

6

9

625

1638

6 19

632 16 46 639 1653 646 17 I

7 I 7 9 7 17

639 646 652

653

725

659

750

6

7 22

1739

7

729 1747 7 37 1756

8

7

o

7

7

17 8 17 16 17 23

714

17 31

631

7 33

741 59 8

b.

m.

15 2 15 10 15 17

1525 1532 1540 1547 1555 16

3

i5 II 16 19 16 27

69°

h.

m.

15 12 15 20

1528 1536 15 44

1634 1643

17

1652

17 20

17 41

1730 1740

18

17 29

1750

18 14

1738 1748

18 o 18 II

1826 1838

1737 1758 1746 18 8 1735 1755 18 18 1744 18 5 1829 1753 18 15 18 40 18 2 1825 18 51

1822 1833 1845

19 3 19 16

1923

20

1835 1846 1857

19 3 19 15

1936 1950

20 17

19 41

1645

17

I

17 10 17 19 17 28

17 17 17 26

18 II 18 21

1831

1857 19 10

1928 20 6

9

18 51 19 I 19 12

919 1950 20 30 21 23 2259 930 20 4 2047 2447 942 20 19 21 5 22 17

21 21 20 21 40

752

8 II

o

8 20

22

S16

22 20 22 40

8 24

856 1923

828

832 841 850

837 846 855

9 o 9 10 9 20

927 1958 2037 938 20 II 2053 950 2025 21 II

9 4 9 13

931 20 941 20 946 20

9 6 9 16

1937

20 14

2

20 40

2056 21

2

MITHSONIAN Tables.

213

21 31 21 54 22 3

21 29 21 52 22 21

23

3

23

2

17 II 17 21 17 31

1752 3

1850

1930 1945 I

2035 2055

1955

20 22 20 40

20 10

2059

21 17 21 42 22 13

20 26

21 20

2258

2044 2145 21

925 2034 21 26 23 1934 20 8 2050 21 50 1946 20 22 21 8 22 19

14 19

I

17 2 17 10 17 19

18 41

815 823

1652

17 I 17 II

1637

8 10 8 19

738

1633

1635 1644 1653

16 21 i5 29

751

20 20 20 40

6

16 42

1823 1832

7

1549 1557

16 26

8

828 837 846

1532 1540

16

7 43

7

m.

16 15 16 24

7 35

7 59

h.

15 23

16 o i5 8 16 17

817 1841 19 8 826 1852 19 20 836 19 3 1933 846 19 14 1946 856 1925 20 o

2

70°

1552

18 5 18 14

8

917

1528

68°

7 45 7 53

748 756 4

7

638 1653 646 17 I 653 17 9

6 19

8

o

616 1630 1645 623 1637 1653

7

7

o

15 15

16 4 16 II 16 17

6

741

832 841 849 852

15 14 15 21

2

613

24

8

15 5 15 II 15 18

5

6

7 13

m.

456

16 24 16 31

7

h.

441 1448 446 1454 452 15 o

1442

6 12

626 632

m.

1453

I

2

h.

67°

1445 1452 450 1458

6

731 45

m.

66°

4 37 4 43

5 55

20

7

b.

544 550 556

7 II 7 17 7

65°

5 53 5 59 6 5

19 19 20 19 40

20 27

h.

4 22

5 10

23 23

m.

41^

4 12

417

2

23

h.

64°

423 1430 429 1436

4 12

5

18 iS 20 iS 40

63°

417 423

4 7

442

20 40

61°

3

I

22 16

Table 87.

•

DURATION OF SUNSHINE AT DIFFERENT LATITUDES.

Declination of

the Sun.

Table 88.

DECLINATION OF THE SUN FOR THE YEAR 1899.

Table 89.

DURATION OF ASTRONOMICAL TWILIGHT. (Interval between sunrise or sunset

and the time when the true position

of the sun's center is i8°

below the horizon.)

NORTH LATITUDE. Date.

0°

Jan.

Feb.

h.

m.

I

I

14

II 21

I

14

I

I

13

I

12 II I 10

May

June

July

m,

I

I

12 12

I

I

m.

li.

m.

h.

m.

h.

m

h,

m,

h.

m.

I

II

I

I

I

IS I 18 I 22 I 24 I 26 I 28 I 3° I 33 I 17 I 21 I 23 I 25 I 27 I 29 I 32 I 24 I 26 I 28 I 31 13 I 16 I 20

h.

m,

I

41 39 38

I

I

II I 14 I 17 II I IS I 18 12 I 16 I 20

I

I

09

I

I

10

I

I

II

I

I

I

II 21

I I

12I1 13 13 I 14 13I1 IS

I

I

14]

16

I

II 21

I

iS|i 17 IS

I

I

I

I

I

II 21

I I

I I

23 I 25 I 27 I 30 I 33 I 27 I 30 I 33 I 36

I

32

39

I

24

I

24 27

I

29

I

I

36

I

I

27

I

3°

I

33

I

36

I

43

I

I

30

I

33

I

I

40

I

48

1

I

I

32

I

36

I

36 39

I

43

I

S4 2

23

I

28

I

41

I

I

I

I

44

I

I

I

29 29

38 40

I

I

iS 36 37

I

24 24

I

41

I

45

I

46 49 50

17 16

I

24

I

29

I

I

I

44 41

I

I

40 38

I

23 I 28 21 I 26

I

36 3S 32

I

I

I

36

I

39

I

19 iS 16

I

14

IS 14 13

I

I

IS

I

13 12

I

14

I

13 I 12

I

Sept. I II 21

I

I

10 09 09

Oct. I

I

09

I

II

I

I

I

I

I

I I

21.

I

II I

I

43

I

53

2

00

39 37

I

48 44

I

I

I

49

I

I

41

I

45

I

54 5°

33 33 33

I

36 36 36

I

39 39

I

48

I

43 43

I

I I

40

I

44

138

I

49

40

I

I

52

I

42

I

I

46 47 49

I

I

41 43 46

I

I

55

44 45 45

I

47 49 49

I

52

I

I

53 54

I

57 59 59

I

30

I

I

I

22

I

24

I

27

I

3°

I

33

I

I I

I

21 22

I

I I I

28 28 28

3° 30

I

I

I

I

I

40

I

I

41 41

I

12 12 I 12

I

13

I

13

I

I

I

14

I

21

I

II 21

I

I

14 14 15

I

15 16

22 22

I

I

I

IS

I

I

19

I

I I

26

I

I

27 28 28

I

I

33

I

I

31 32

I

32

I

34 iS

I

I

I

29

I

I

36 30

I

Smithsonian Tables.

215

I

I

34 36 38

I I

I

I

I

I

25 26

I

31

II 21

I

I

12 2 23 2 40 2 18 2 31

I

27 I 29 I 32 23 25 17 I 24 I 26 I 28 I 30 I 33 18 I 20 I 24 I 26 I 28 I 30 I 32 I 35 I

I

I

I

I

2

I

27

I

01 2 10 2 20 lo 2 20 2 35 20 2 35 2 58

39 36 34

I

36

II I

2

02

I

I

2

54 01 2 10

I

20

I

1

2

2

I

I

54

54

44 39 36

20

2

1

48 43

I

I

48 54 01

I

1 54 54 2 00 01 2 08

I

I

36 33

25 25 26

49

1

I

40

I

I

10

I

I

44

2

I

23 23 24

43 48

48 48 50

01

36 ii

I

40

I

2

I

I

I

I

I

I

I

21 21 22

36 39 43

I

I

48

33 30

I

I

43 43 45

I

I

I

I

I

I

39 39 41

I

07

I

19 19

I

36 36 37

I

2

27 24

I

I

I

2

30

I

40

49 48

I

59 54

I

16 16 16

52

I

I

I

02

I

I

I

I

47 45 44

I

I

24 22

I

I

39 37 36

2

13 I 17 I 21 I 23 I 25 I 27 I 30 I 33 I 13 I 16 I 20 I 22 I 24 I 26 I 29 I 31

13 13 13

43 41

I

I

59 57 54

55 52

I

I

I

I

h,

I

49 46 43

I

49

I

I

49 47 45

52 1 59 2 07 2 18 2 31 2 54 55 2 02 2 12 2 23 2 40 3 II 56 2 03 2 13 2 25 2 44 3 19

I

10 10

I

22 24 26

I

I

I

I

I

I

41

I

II 21

I

I

I

I

I

m,

S3 52

I

33

I

I

m.

h.

h.

I

II I 13 I 16 I 20 I 21 I 23 I 25 I 28 I 30 I 33 I 09 I 10 I 13 I 16 I 19 I 21 I 23 I 25 I 28 I 30 I 33 I og I 10 I 13 I 16 I 20 I 22 I 24 I 26 I 29 I 31 I 34

lO

14

50

I

m.

45 43

h.

I

I

I

Dec.

h.

18. I

36 34

I

I

Nov.

m.

21 I 26 I 28 I 29 I 31 I 34 I 37 I I I 21 I 2S I 27 I 29 I 31 I 33 I 36 I 17 I 20 I 23 I 2S I 28 I 30 I 32 I 34 I

II 21

Aug.

h.

h.

IS 14 13

I

II 21

Apr.

h.

I

II 21

I

Mar.

10° 20° 25° 30° 32° 34° 36° 38° 40° 42° 44° 46° 48°

36 37 38

I

I

I

I

2 10 2 20 2 35 54 2 01 2 10 2 20 48 I 54 2 01 2 09

I I

I

I

I

Table 90.

DURATION OF CIVIL TWILIGHT. (Interval between sunrise or sunset is

and the time when the true position of the sun's center 6° below the horizon.) [Minutes.]

Table 91

RELATIVE INTENSITY OF SOLAR RADIATION, A/lean

Date.

intensity / for 24 liours of solar radiation on a liorizontal surface at the top of tlie atmospliere and tlie solar constant ^, in terms of tKe mean solar constant ^o.

Table 92.

RELATIVE AMOUNTS OF SOLAR RADIATION RECEIVED ON A HORIZONTAL SURFACE DURING THE YEAR AT DIFFERENT LATITUDES,

MISCELLANEOUS TABLES.

Weight

in grams of a cubic centimeter of air:

English measures

— Temperature term Humidity term;

auxiliary table

.

.

Table

95

Table

96

Table

97

Table

98

Table

99

Humidity and pressure terms, combined

Metric measures

—

Temperature term

Humidity term; auxiliary

table

.

.

Humidity and pressure terms, com-

Table 100

bined

Atmospheric water-vapor

lines in the visible

Atmospheric water-vapor bands

spectrum

in the infra-red

.

.

spectrum

Transmission percentages of radiation through moist

air

.

.

.

.

Table

10 i

Table

102

Table

103

International Meteorological Symbols

Table 104

International Cloud Classification

Table

Beaufort Weather Notation

Table 106

List of meteorological stations

Table

105

107

Table 95.

WEIGHT

IN

CRAMS OF ONE CUBIC CENTIMETER OF

Temperature term:

Jj

= I

I

AIR.

0.00129305 Fahrenheit temperatures. {t —32°)'

+0.0020389

cubic centimeter of dry air at the temperature 32° F.

and pressure 760 mm., under the

standard value of gravity and sea-level, weighs 0.00129305 gram.

Temperature.

Table 96.

WEIGHT

IN

GRAMS OF ONE CUBIC CENTIMETER OF

Humidity term: Values e

= Vapor pressure

in inches.

of

0378

e.

Auxiliary to Table 97. (See Tables 69

Temperature by normal hydrogen thermometer.

DewPoint.

AIR.

and

70.)

Table 97.

WEIGHT

IN

CRAMS OF ONE CUBIC CENTIMETER OF

Humidity and pressure terms combined:

r5,,

B= h.

Barometric pressure in inches; e

=

= 29.921

= Vapor

AIR.

——

29.921

pressure in inches.

WEIGHT

IN

TT

.jv and J . I.J Humidity pressure terms combined:

* r-

So

B= h.

Table 97. AIR.

CRAMS OF ONE CUBIC CENTIMETER OF

Barometric pressure in inches;

e

^

=

= Vapor

—

= 5-o.378e =

29.921

29.921

pressure in inches.

Table 98.

WEIGHT

IN

CRAMS OF ONE CUBIC CENTIMETER OF

Temperature term: I

5;

^^^

=

—

^-

^~1-

AIR.

Centigrade temperature.

cubic centimeter of dry air at the temperature o° C. and pressure 760 mm., under the standard value of gravity and sea-level, weighs 0.00129305 gram.

t.

WEIGHT

IN

GRAMS OF ONE CUBIC CENTIMETER OF Temperature term. {Continued.)

\.

Table 98. AIR.

Table 100.

WEIGHT

IN

CRAMS OF ONE CUBIC CENTIMETER OF

Humidity and pressure terms combined

:

—"= '

h

5—0.378,?

760

760

B^ Barometric pressure in mm. ^= Vapor pressure in mm. ;

h.

AIR.

Table 100,

WEIGHT

IN

CRAMS OF ONE CUBIC CENTIMETER OF AIR. S h =B — 0.378^

Humidity and pressure terms combined

B^ Barometric pressure in mm. h.

mm.

;

^

:

— = -7-

-j

= Vapor pressure in mm.

Table 100.

WEIGHT

IN

GRAMS OF ONE CUBIC CENTIMETER OF

AIR.

Table

ATMOSPHERIC WATER-VAPOR LINES Wave

lengths

Angstroms.

in

5292 3-5296.0 5861.8-5870.0. 5870.864.

5871.3-58760

Number of

Wave

Intensity.

.

4?

.

.

7

CO CO I

.

CO

...

5876.338 5876.6-5879.4 ... 5879.820.. 5879.945 5S80. 7-588 CO ... 5881.147. 5881.320. 5882.084 5882.2-58832.... 5884 120. 58S4. 4-5885. 8 5886.193.. 5886.560 5886.6-5886.9 ... 5887.445 5887,880 5888.056.

I

.

00 1 I

.

5920395

I

5920.776 5921.3-5922.6 5922.735 5922.9-5923.4

I

.

o

.

2

5932998

I

5933.2-5940.2 5940.640 5941.091 5941.290 5941.470 5941.845 5942.500 5942.635 5942 789 5944.5305944-945

.

2

5945.4-59-15 5

.

00

3 2

00 I

o 4

5891878..

3

.

o I

o

5896710

.

5897.047 5897.3-5898-2 589S.378. 5898.6-5899.0 ... 5899-215 5899.752.. •

4 00 2

00 2

5900 135.. 5900.260 5900 6-5901.5 5901.682. 5902.238 5902.363 5903 035 5903 748 5903-9-590" -7 5908 070 5908.425

4

CO 6 000

.

I

000

.

t

.

13

5909 668

00 I I

5909213

3

00

.

I

5,910.398

5910.5-5910.9 5910.987 5911.1-5912.9... 59r3.2i2 5914 430

00 2

00 ,

7

00 I

o 2

3

6

4 coo 2

000 2

CO

5892.608 5893.268 5893.725 5894.6-5896.6

5

00

5889.303..

•

.

5928510

5888920..

.

.

I

5929.0-5931.2. 5932.306

5890.100 5890.4-5890.9 5891 398 5891.720..

I

00 4 000

2

00

5889855..

I

592.3.865

5 3

.

sity.

line".

5924.040 5924.490 5924.975 5925.220 5926.835

o

.

Inten-

5

I

•

ber of

00 5

.

01

I

5915.146 5915 650 59'5 840 5916.0-5918.2. 5918.635. 5919.175 5919 276 5919.860

o o

Num-

lengths

in Angstroms.

lines.

.

IN

1

THE VISIBLE SPECTRUM.

5 2

14

I

00 5

000 2

oco I

3 I

I

00

5945.865 5946.223..... 5946-864 5947-062 5947.283 5947-6-5949-2 5949.390 5949.8-5954.6 5955.170 5956.0-5956.6 5958.098 5958.460 5961.6-5966 6 5966.885 5967-540 5968.058 5968.280 5968.495 5969.2-5970.9 5971 557 5975 33°. 5976.694 5977.252 5977.6-6479.7 .

229

000

I

3

000 I

2

000 2

00 I

000 I I

00 I

00 2

000

,

2

00 I I

•

00 I

73

000

Table 101.

ATMOSPHERIC WATER-VAPOR LINES Wave in

lengths

Angstroms.

6480.285.. 6480.4-64S3.3 6483.468.. 6483.6-6490 9. 6491 015.. .

.

.

.

6493.1-64935....

Number of

THE VISIBLE SPECTRUM.

Wave

Intensity.

in

lines.

Num-

lengths

ber of

Angstroms.

lines.

Intensity.

000

I

6941. 260. 6941 475- •• 6942. 402. . 6942, 630. 6944. 060..

00

6947 ,782...

5

6947. 863. 6949 240. 6949 310... 6951 010. 6953 828.

00

6954.0-6955 9 6956 660 \. 6956 746/.

00 4

6959' 704. 6961, .515- • 6964, 812...

3

6971, 135.--

o

6977 .715.

3

.

I

4

0000 I

II 2

I

2 I

.

000

3

.

6494.725.-

I

6496 082 6497.8-6514.5.... 6514.956.. 6516 oSo 6516.750.. 6516.855.. 65I7-3-65I9-4 6519.682. 6522.1-6523.9 6524.080 6526.0-6530 8 6532 595. 6534.172.. 6534.8-6542.6 6544.140.. 6546.0-6547.9. .. 6548.855

I

.

2

00

I I

.

2

I

.

000

.

I

2

00

I

.

I

ooco I

.

000 I

2

000

.

I

6552865.. 6554 025

00? I

I?

00 I

o

7011, 7016, 7016, 7023, 7027, 7027,

000 2

-

I

6985 .220..

3

o 3 I

2 I

o 2

o 2

o

7005.3-7010

I

.

.

6981 ,722..

6998. 978.. 6999. 223... 7004, 575 •• • 7004, 995- ••

O

.

I

6990 632... 6993 776... 6994 360...

I

6556.30S.. 6557-4-6558 4..-. 6560 800. 6563-7-6569.0 6572.330,. 6575-085 65S0. 4-6929. 6. 6934-075 6937 9576938.520.. 6939 875 6940.436..

4

6986, 833. • 125... 6989 ,237...

2

00

.

.

IN

2 I

2

590-. 330675-. 770.. 213.. 740..

I

3 2

o 2

Table 102.

ATMOSPHERIC WATER-VAPOR BANDS

IN

THE INFRA-RED SPECTRUM.

The infra-red ban-^s may perhaps be composed

Name of band.

Wave- Transmislengths,

sion coefficient a.

numerous fine lines which the holographic apparatus does not separately distinguish. Wide bands of very great atmospheric watervapor absorption are found in the infra-red spectrum as follows of

:

0,718 0.814 P

Ixiii,

xx> 5°

arc into into arc

19s

xx, 51 xxu, 57 xxii, 58

mean, at apparent noon Radiation, solar, relative intensity of, for 24 hours at top of atmosphere Ixvii, 217 Ixviii, 218 during year at surface of the earth transmission percentages of, through moist air, Ixxi, 231 Rainfall, conversion of depth of, into gallons and tons Ixiii, 195 Reaumur, conversion to Approximate Absolute, Cenxii, 2-4 tigrade and Fahrenheit Reduction, of barometer to xxxiv-xxxviii, 129standard gravity xxx-xxxiv, 86standard temperature of psychrometric observations, Ivii-lx, 172English Ivii-lxi, 186 Metric Ixii, 194of snowfall measurements xxxii, li, lii, Regnault, treatise cited Rehtive humidity, Ix, 183-: English Metric Ixi, 192Relative intensity of solar radiation. .Ixvii-lxviii, 217Rode, Danish, value of XXV Rotch, A. L., work cited

Rowland, work cited Rubens and Aschinass, treatise cited Ruthe, Prussian, value of Norwegian, value of

Ixxi

48

comparison of Approximate Absolute, Centi-

grade, Fahrenheit,

xxii,

...

58 48

through moist -Ixxi,

air

231

Ixvh, 215

Twilight, duration of astronomical duration of civil

bivii,

216

Vapor, aqueous, pressure of,

English Metric pressure

160-164 165-168

lii-lv,

.lii-lv,

by psychrometric

observations,

English

Ix,

172-182 186-191

Iv-lvii,

169-170

lix,

Metric

;

pressure decrease with altitude, for mountain stations specific gravity

weight of Vara, values of,

Ixi,

48 48 48 229-230

Mexican Spanish Versta or Werst, value of Visible spectrum, water vapor lines in ._

194

Iv-lvi

_

Ixxi,

231

Sagene, Russian, value of Scales,

mean solar into sidereal sidereal into mean solar ToisS, value of Transmission percentages of radiation

and Reaumur

xii-xiii,

2-4

Sea-level,

reduction of temperature to, English

Metric Seconds, conversion of decimals of a day into into arc into decimals of a day into decimals of an hour reduction for, sidereal or solar time Sidereal time, conversion to mean solar Simpson, Dr. G. C, work cited Sky, relative illumination intensity, at sunset at end of civil twilight Snowfall, weight corresponding to depth of water Ixii,

XXX, 82 xxx, 83 xxi, 56 xx, 51 xxi, 56 xxi, 57 xxii, xxii,

58 58

xxv 218 218

194-igs

liii Waals, J. D. van der, work cited Water, vapor of (see Aqueous) Ixxii, 236 Weather, state of, Beaufort symbols for Weight, of saturated aqueous vapor. Iv-lvii, 169 Cubic foot .Iv-lvii, 170 Cubic meter in grams, of a cubic centimeter of air, Ixix-lxx, 220-223 English Ixix-lxx, 224-228 Metric 48 Werst or versta, value of xxiv-xxix, 64-79 Wind tables Wind, mean direction by Lambert's formula xxv-xxvii, 71-76 true direction and velocity at sea, determina-

xxv tion of xxvii-xxix, 77-79 gradient, velocity of radius of critical curvature, .xxvii-xxix, 77-7Q xxiv-xxv, 70 scale, Beaufort's xxiv, 64 synoptic conversion of velocities .

Year, days into decimals tropical, length of

of,

and angle

xx, 52-s5_ xxii

CAMBRIDGE

U

MASSACHUSETTS

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•

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A

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