Leacock, Stephen, 1869 1944 - "Arcadian Adventures With the Idle Rich"

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John Drinkwater - "Preludes 1921 1922"

Charlotte M. Yonge - "Magnum Bonum"

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Books: Himalayan Journals (Complete)

J >> J. D. Hooker >> Himalayan Journals (Complete)




That the Calcutta amplitude is not exceptionally great, is shewn by
the register kept at different places in the Gangetic valley and
plains of India, between Saharunpore and the Bay of Bengal. I have
seen apparently trustworthy records of seven* [Calcutta, Berampore,
Benares, Nagpore, Moozufferpore, Delhi, and Saharunpore.] such, and
find that in all it amounts to between 0.084 and 0.120 inch, the mean
of the whole being 0.101 of an inch.

The amplitude is greatest (0.088) in the spring months (March, April,
and May), both at Dorjiling and Calcutta: it is least at both in June
and July, (0.027 at Dorjiling), and rises again in autumn (to .082 in
September).

The horary oscillations also are as remarkably uniform at all
elevations, as the period of ebb and flow: the mercury falls slowly
from 9.50 a.m. (when it is at its highest) till noon, then rapidly
till 3 p.m., and slowly again till 4 p.m.; after which there is
little change until sunset; it rises rapidly between 7 and 9 p.m.,
and a little more till 10 p.m.; thence till 4 a.m. the fall is
inconsiderable, and the great rise occurs between 7 and 9 a.m.

It is well known that these fluctuations of the barometer are due to
the expansion and contraction by heat and moisture of the column of
atmosphere that presses on the mercury, in the cistern of the
instrument: were the air dry, the effect would be a single rise and
fall;* [This law, for which we are indebted to Professor Dove, has
been clearly explained by Colonel Sabine in the appendix to his
translation of Humboldt's "Cosmos," vol. i. p. 457.] the barometer
would stand highest at the hottest of the twenty-four hours, and
lowest at the coldest; and such is the case in arid continental
regions which are perennially dry. That such would also be the case
at Calcutta and throughout the Himalaya of Sikkim, is theoretically
self-evident, and proved by my horary observations taken during the
rainy months of 1848. An inspection of these at the end of this
section (where a column contains the pressure of dry air) shows but
one maximum of pressure, which occurs at the coldest time of the
twenty-four hours (early in the morning), and one minimum in the
afternoon. In the table of mean temperatures of the months, also
appended to this section, will also be found a column allowing the
pressure of dry air, whence it will be seen that there is but one
maximum of the pressure of dry air, occurring at the coldest season
in December, and one minimum, in July. The effect of the vapour is
the same on the annual as upon the diurnal march of the pressure,
producing a double maximum and minimum in the year in one case, and
in the twenty-four hours in the other.

I append a meteorological register of the separate months, but at the
same time must remind the reader that it does not pretend to strict
accuracy. It is founded upon observations made at Dorjiling by Dr.
Chapman in the year 1837, for pressure temperature and wet-bulb only;
the other data and some modifications of the above are supplied from
observations of my own. Those for terrestrial and nocturnal radiation
are accurate as far as they go, that is to say, they are absolute
temperatures taken by myself, which may, I believe, be recorded in
any year, but much higher are no doubt often to be obtained.
The dew-points and saturations are generally calculated from the mean
of two day observations (10 a.m. and 4 p.m.) of the wet-bulb
thermometer, together with the minimum, or are taken from
observations of Daniell's hygrometer; and as I find the mean of the
temperature of 10 a.m., 4 p.m., and the minimum, to coincide within a
few tenths with the mean temperature of the whole day, I assume that
the mean of the wet-bulb observations of the same hours will give a
near approach to that of the twenty-four hours. The climate of
Dorjiling station has been in some degree altered by extensive
clearances of forest, which render it more variable, more exposed to
night frosts and strong sun-heat, and to drought, the drying up of
small streams being one direct consequence. My own observations were
taken at Mr. Hodgson's house, elevated 7,430 feet, the position of
which I have indicated at the commencement of this section, where the
differences of climate due to local causes are sufficiently indicated
to show that in no two spots could similar meteorological results be
obtained. At Mr. Hodgson's, for instance, the uniformity of
temperature and humidity is infinitely more remarkable than at Dr.
Chapman's, possibly from my guarding more effectually against
radiation, and from the greater forests about Mr. Hodgson's house.
I have not, however, ventured to interfere with the temperature
columns on this account.

DORJILING METEOROLOGICAL REGISTER.

Jan. Feb. Mar. Apr. May June
Pressure of Atmosphere* 23.307 .305 .307 .280 .259 .207
Range of Pressure .072 .061 .083 .085 .088 .067
Mean Shade 40.0 42.1 50.7 55.9 57.6 61.2
Max. Shade 56.0 57.0 66.5 68.5 69.0 71.0
Max. Sun 119.0 124.0 120.0 125.0 125.0 126.2
Greatest Diff. 72.0 78.0 60.0 66.0 65.0 62.2
Mean Max. Shade 47.2 50.0 58.4 63.7 65.3 66.7
Minim. Shade 29.0 25.5 37.0 38.0 38.0 51.5
Minim. Rad. 16.0 23.0 27.8 33.0 40.0 47.0
Greatest Diff. 12.7 15.3 8.7 16.0 10.0 4.8
Mean Minim. Shade 32.8 34.2 43.1 48.1 50.0 55.8
Mean Daily Range of Temp. 14.4 15.8 15.3 15.6 15.3 10.9
Sunk Therm. 46.0 48.0 50.0 58.0 61.0 62.0
Mean Dew-Point 34.3 37.2 45.8 49.8 54.4 59.5
Mean Dryness 5.1 3.9 5.8 6.6 2.7 2.0
Force of Vapour .216 .239 .323 .371 .434 .515
Pressure of Dry Air 23.091 .066 .084 22.909 .825 .692
Mean Saturation .84 .87 .82 .80 .91 .93
Rain in Inches 1.72 0.92 1.12 2.52 9.25 26.96

July Aug. Sep. Oct. Nov. Dec. Mean
Pressure of Atmosphere* 23.203 .230 .300 .372 .330 .365 23.289
Range of Pressure .062 .070 .082 .075 .078 .062 .074
Mean Shade 61.4 61.7 59.9 58.0 50.0 43.0 53.5
Max. Shade 69.5 70.0 70.0 68.0 63.0 56.0 65.4
Max. Sun 130.0 133.0 142.0 133.0 123.0 108.0 125.7
Greatest Diff. 62.0 62.0 70.0 65.0 68.0 77.2 67.3
Mean Max. Shade 65.5 66.1 64.7 66.5 56.5 51.6 60.2
Minim. Shade 56.0 54.5 51.5 43.5 38.0 32.5 41.3
Minim. Rad. 52.0 50.0 47.5 32.0 30.0 26.0 35.4
Greatest Diff. 3.5 3.5 10.0 12.0 12.0 10.0 9.9
Mean Minim. Shade 57.3 57.4 55.2 49.5 43.5 34.9 46.8
Mean Daily Range of Temp. 8.2 8.7 9.5 17.0 13.0 16.7 13.4
Sunk Therm. 62.2 62.0 61.0 60.0 55.0 49.0 56.2
Mean Dew-Point 60.7 60.4 58.5 52.5 46.5 31.8 49.4
Mean Dryness 0.8 1.1 1.4 4.2 3.2 10.6 4.0
Force of Vapour .535 .530 .498 .407 .331 .198 .383
Pressure of Dry Air 22.668 .700 .802 .865 .999 23.165 22.906
Mean Saturation .97 .96 .95 .86 .90 .69 .88
Rain in Inches 25.34 29.45 15.76 8.66 0.11 0.45 Sum
122.26

*These are taken from Dr. Chapman's Table; and present a greater
annual range (=0.169) than my observations in 1848-9, taken at Mr.
Hodgson's, which is higher than Dr. Chapman's; or Mr. Muller's, which
is a little lower, and very near.


_Horary Observations at Jillapahar, Dorjiling, Alt. 7,430 feet._

JULY, 1848

No. of
Observations 7 23 27 22 20 26 12 11 25
Hour 1 a.m. 8 9 10 11 Noon 1 p.m. 2 3
Barom.
corrected 22.877 .882 .884 +.899 .899 .884 .876 .866 .852
Temp. Air 59.6 62.1 62.6 63.5 64.1 65.0 64.1 64.4 64.8
D.P. 58.9 60.6 61.3 61.7 62.3 63.1 61.7 61.0 62.6
Diff. 0.7 1.5 1.3 1.8 1.8 1.9 2.4 3.4 2.2
Tens. of
Vapour .504 .534 .546 .554 .565 .580 .566 .541 .571
Weight of
Vapour 5.65 6.03 6.10 6.12 6.27 6.44 6.13 6.00 6.32
Humidity .988 .950 .960 .945 .945 .940 .923 .892 .930
Press. of
Dry Air 22.373 .348 .338 .345 .334 .304 .310 .325 .281

No. of
Observations 23 13 10 6 6 22 6 6 19
Hour 4 p.m. 5 6 7 8 9 10 11 M.n.
Barom.
corrected 22.846 -.840 .845 .853 .867 .878 .885 +.887 .887
Temp. Air 64.1 64.7 63.7 62.7 61.0 60.7 60.5 60.2 59.8
D.P. 61.7 64.0 61.5 61.1 59.5 59.4 59.5 59.2 59.1
Diff. 2.4 0.7 2.2 1.6 1.5 1.3 1.0 1.0 0.7
Tens. of
Vapour .554 .597 .549 .542 .515 .512 .514 .508 .507
Weight of
Vapour 6.13 6.62 6.12 6.03 5.74 5.72 5.75 5.70 5.68
Humidity .924 .978 .928 .948 .952 .960 .968 .965 .975
Press. of
Dry Air 22.292 -.243 .296 .311 .352 .366 .371 .379 +.382


AUGUST

No. of
Observations 15 26 28 28 24 23 21 21 21
Hour 1 a.m. 8 9 10 11 Noon 1 p.m. 2 3
Barom.
corrected 22.909 .904 .915 +.917 .915 .905 .898 .884 .873
Temp. Air 59.8 62.1 63.1 64.3 64.7 64.7 65.3 65.0 64.8
D.P. 59.5 61.5 61.9 62.7 63.1 63.4 63.3 63.4 63.1
Diff. 0.3 0.6 1.2 1.6 1.6 1.3 2.0 1.6 1.7
Tens. of
Vapour .514 .549 .558 .572 .580 .586 .584 .586 .579
Weight of
Vapour 5.70 6.13 6.20 6.35 6.42 6.50 6.48 6.50 6.43
Humidity .992 .980 .962 .950 .948 .958 .940 .950 .943
Press. of
Dry Air +22.395 .355 .357 .345 .335 .319 .314 .298 .294

No. of
Observations 19 19 19 19 19 19 19 19 19
Hour 4 p.m. 5 6 7 8 9 10 11 M.n.
Barom.
corrected 22.855 -.853 .863 .865 .878 .890 +.823 .892 .889
Temp. Air 63.9 63.2 62.3 61.6 61.1 60.7 60.3 60.1 60.0
D.P. 62.4 61.7 60.8 60.4 60.2 60.0 59.7 59.7 59.4
Diff. 1.5 1.5 1.5 1.2 0.9 0.7 0.6 0.4 0.6
Tens. of
Vapour .568 .554 .538 .531 .527 .523 .518 .517 .513
Weight of
Vapour 6.30 6.15 6.00 5.92 5.88 5.85 5.78 5.79 5.73
Humidity .952 .952 .952 .952 .970 .976 .980 .988 .980
Press. of
Dry Air -.287 .299 .325 .334 .351 .367 .375 .375 .376


DECEMBER

No. of
Observations 28 29 28 24 23 23 23 23 23
Hour 8 a.m. 9 10 11 Noon 1 p.m. 2 3 4
Barom.
corrected 23.000 .013 +.018 .009 22.995 .980 .962 .947 -.944
Temp. Air 59.2 60.1 60.8 61.6 62.4 62.7 62.8 62.3 61.8
D.P. 58.1 58.5 59.5 60.0 60.5 60.5 60.4 60.0 59.9
Diff. 1.1 1.6 1.3 1.6 1.9 2.2 2.4 2.3 1.9
Tens. of
Vapour .492 .497 .514 .523 .533 .532 .531 .522 .521
Weight of
Vapour 5.50 5.57 5.77 5.83 5.93 5.92 5.90 5.83 5.82
Humidity .968 .945 .958 .950 .942 .942 .925 .924 .940
Press. of
Dry Air 22.508 .516 .504 .506 .462 .448 .431 .425 -.423

No. of
Observations 19 19 20 21 22 24 24 23
Hour 5 p.m. 6 7 8 9 10 11 M.n.
Barom.
corrected 22.944 .948 .958 .975 .986 +.991 .989 .994
Temp. Air 60.3 59.4 58.7 58.2 57.8 57.4 57.0 56.7
D.P. 58.6 58.4 57.4 57.0 56.6 56.4 55.9 55.4
Diff. 1.7 1.0 1.3 1.2 1.2 1.0 1.1 1.3
Tens. of
Vapour .498 .496 .479 .473 .467 .463 .456 .449
Weight of
Vapour 5.58 5.58 5.60 5.33 5.25 5.23 5.15 5.07
Humidity .940 .968 .960 .962 .960 .968 .962 .927
Press. of
Dry Air .446 .452 .479 .502 .519 .528 .533 +.545


OCTOBER (22 days)

No. of
Observations 11 19 20 20 19 13 15 13 13 14
Hour 6-6.30 a.m. 7 8 9 10 11 Noon 1 p.m. 2 3
Barom.
corrected 23.066 .072 .086 .099 +.100 .079 .072 .055 .033 .027
Temp. Air 54.4 54.3 55.2 56.3 57.1 57.6 57.9 58.0 57.7 57.9
D.P. 52.7 52.3 53.7 54.4 55.5 55.6 56.1 56.4 56.6 56.2
Diff. 1.7 2.0 1.5 1.9 1.6 2.0 1.8 1.6 1.1 1.7
Tens. of
Vapour .4.9 .403 .423 .434 .450 .451 .459 .463 .466 .460
Weight of
Vapour 4.65 4.58 4.78 4.90 5.07 5.08 5.15 5.17 5.25 5.16
Humidity .943 .925 .950 .935 .942 .935 .940 .950 .962 .940
Press. of
Dry Air +22.657 +.669 .663 .665 .650 .628 .613 .592 .567 .567

No. of
Observations 16 13 6 7 3 7 14 18 14
Hour 4 p.m. 5 6 7 8 9 10 11 M.n.
Barom.
corrected 23.024 -.022 .033 .045 .038 .061 +.072 .067 .068
Temp. Air 57.9 56.6 55.9 55.4 53.7 55.1 54.6 54.5 54.1
D.P. 56.1 54.8 54.4 53.8 53.3 54.1 53.0 53.0 52.8
Diff. 1.8 1.8 1.5 1.6 0.4 1.0 1.6 1.5 1.3
Tens. of
Vapour .458 .439 .433 .424 .417 .429 .413 .413 .411
Weight of
Vapour 5.15 4.98 4.90 4.80 4.75 4.83 4.82 4.82 4.65
Humidity .940 .948 .950 .950 .990 .965 .949 .950 .962
Press. of
Dry Air -.566 .583 .600 .621 .621 .632 .659 .654 .657


APPENDIX G.

ON THE RELATIVE HUMIDITY, AND ABSOLUTE AMOUNT OF VAPOUR
CONTAINED IN THE ATMOSPHERE AT DIFFERENT ELEVATIONS IN
THE SIKKIM HIMALAYA.

My observations for temperature and wet-bulb being for the most part
desultory, taken at different dates, and under very different
conditions of exposure, etc., it is obvious that those at one station
are hardly, if at all, comparative with those of another, and I have
therefore selected only such as were taken at the same date and hour
with others taken at the Calcutta Observatory, or as can easily be
reduced; which thus afford a standard (however defective in many
respects) for a comparison. I need hardly remind my reader that the
vapour-charged wind of Sikkim is the southerly one, which blows over
Calcutta; that in its passage northwards to Sikkim in the summer
months, it traverses the heated plains at the foot of the Himalaya,
and ascending that range, it discharges the greater part of its
moisture (120 to 140 inches annually) over the outer Himalayan
ranges, at elevations of 4000 to 8000 feet. The cooling effect of the
uniform covering of forest on the Sikkim ranges is particularly
favourable to this deposition, but the slope of the mountains being
gradual, the ascending currents are not arrested and cooled so
suddenly as in the Khasia mountains, where the discharge is
consequently much greater. The heating of the atmosphere, too, over
the dry plains at the foot of the outer range, increases farther its
capacity for the retention of vapour, and also tends to render the
rain-fall less sudden and violent than on the Khasia, where the south
wind blows over the cool expanse of the Jheels. It will be seen from
the following observations, that in Sikkim the relative humidity of
the atmosphere remains pretty constantly very high in the summer
months, and at all elevations, except in the rearward valleys; and
even there a humid atmosphere prevails up to 14,000 feet, everywhere
within the influence of the snowy mountains. The uniformly high
temperature which prevails throughout the summer, even at elevations
of 17,000 and 18,000 feet, is no doubt proximately due to the
evolution of heat during the condensation of these vapours. It will
be seen by the pages of my journal, that continued sunshine, and the
consequent heating of the soil, is almost unknown during the summer,
at any elevation on the outer or southward ranges of Dorjiling: but
the sunk thermometer proves that in advancing northward into the
heart of the mountains and ascending, the sun's effect is increased,
the temperature of the earth becoming in summer considerably higher
than that of the air. With regard to the observations themselves,
they may be depended upon as comparable with those of Calcutta, the
instruments having been carefully compared, and the cases of
interpolation being few. The number of observations taken at each
station is recorded in a separate column; where only one is thus
recorded, it is not to be regarded as a single reading, but the mean,
of several taken during an hour or longer period. I have rejected all
solitary observations, even when accompanied by others at Calcutta;
and sundry that were, for obvious reasons, likely to mislead. Where
many observations were taken at one place, I have divided them into
sets, corresponding to the hours at which alone the Calcutta
temperature and wet-bulb thermometer are recorded,* [Sunrise; 9.50
a.m.; noon; 2.40 p.m.; 4 p.m., and sunset.] in order that
meteorologists may apply them to the solution of other questions
relating to the distribution of heat and moisture. The Dorjiling
observations, and those in the immediate neighbourhood of that
station, appeared to me sufficiently numerous to render it worth
while classing them in months, and keeping them in a series by
themselves. The tensions of vapour are worked from the wet-bulb
readings by Apjohn's formula and tables, corrected for the height of
the barometer at the time. The observations, except where otherwise
noted, are taken by myself.


SERIES I. _Observations made at or near Dorjiling._

JANUARY, 1849

DORJILING
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
15 The Dale* 6956 ft. 9.50 a.m. 42.9 32.4 10.5 .202
15 Mr. Muller's ... Noon 45.8 33.8 12.0 .212
10 ... ... 2.40 p.m. 48.3 37.4 10.9 .241
8 ... ... 4 p.m. 48.6 37.8 10.8 .244
9 ... ... Sunset 46.5 37.1 9.4 .238
---------------------------------------------------------------------
57 ... ... Mean 46.4 35.7 10.7 .227
---------------------------------------------------------------------


CALCUTTA
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
15 The Dale* 6956 ft. 9.50 a.m. 67.5 55.3 12.2 .446
15 Mr. Muller's ... Noon 72.9 55.7 17.2 .455
10 ... ... 2.40 p.m. 76.1 55.1 21.0 .444
8 ... ... 4 p.m. 75.1 54.8 20.3 .440
9 ... ... Sunset 71.8 54.9 16.9 .441
---------------------------------------------------------------------
57 ... ... Mean 72.7 55.2 17.5 .445
---------------------------------------------------------------------

*Observations to which the asterisk is affixed were taken by
Mr. Muller.

Dorjiling.--Humidity 0.700 Calcutta 0.562
,, Vapour in cubic foot
of atmosphere 2.63 gr. ,, 4.86 gr.



JANUARY, 1850
DORJILING
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
3 Jillapahar, 7430 ft. Sunrise 32.8 30.1 2.7 .186
6 Mr. Hodgson's ... 9.50 a.m. 39.5 34.7 4.8 .219
3 ... ... Noon 42.4 38.0 4.4 .246
5 ... ... 2.40 p.m. 41.9 37.8 4.1 .244
5 ... ... 4 p.m. 41.1 38.5 2.6 .250
5 ... ... Sunset 38.7 35.6 3.1 .226
13 ... ... Miscel. 41.9 39.9 2.0 .263
4 Saddle of road 7412 ft. Do. 41.1 36.4 4.7 .233
at Sinchul.
1 Pacheem. 7258 ft. Do. 39.8 38.7 1.1 .252
---------------------------------------------------------------------
45 ... ... Mean 39.9 36.6 3.3 .235
---------------------------------------------------------------------

CALCUTTA
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
3 Jillapahar, 7430 ft. Sunrise 51.5 48.5 3.0 .354
6 Mr. Hodgson's ... 9.50 a.m. 66.9 55.1 11.8 .444
3 ... ... Noon 74.1 51.7 22.4 .395
5 ... ... 2.40 p.m. 78.3 51.4 26.9 .391
5 ... ... 4 p.m. 77.4 59.5 17.9 .514
5 ... ... Sunset 72.4 54.7 17.7 .438
13 ... ... Miscel. 77.9 60.1 17.8 .525
4 Saddle of road 7412 ft. Do. 67.7 57.2 10.5 .476
at Sinchul.
1 Pacheem. 7258 ft. Do. 71.6 50.5 21.2 .379
---------------------------------------------------------------------
45 ... ... Mean 70.9 54.3 16.6 .435
---------------------------------------------------------------------

Dorjiling.--Humidity 0.890 Calcutta 0.580
,, Weight of vapour 2.75 gr. ,, 4.86 gr.

FEBRUARY
DORJILING
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
3 Jillapahar, 7430 ft. Sunrise 36.9 34.7 2.2 .219
18 1850 ... 9.50 a.m. 42.9 38.6 4.3 .251
12 ... ... Noon 44.8 41.3 3.5 .276
12 ... ... 2.40 p.m. 44.8 37.4 7.4 .241
17 ... ... 4 p.m. 44.0 35.6 8.4 .226
19 ... ... Sunset 42.4 35.8 6.6 .228
13 The Dale* 6956 ft. Miscel. 40.8 35.1 5.7 .222
---------------------------------------------------------------------
97 ... ... Mean 42.4 36.9 5.4 .238
---------------------------------------------------------------------

CALCUTTA
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
3 Jillapahar, 7430 ft. Sunrise 60.0 54.2 5.8 .431
18 1850 ... 9.50 a.m. 72.8 58.8 14.0 .503
12 ... ... Noon 79.8 58.7 21.2 .501
12 ... ... 2.40 p.m. 82.4 57.9 24.5 .487
17 ... ... 4 p.m. 81.1 58.1 23.0 .492
19 ... ... Sunset 76.3 60.7 15.6 .536
13 The Dale* 6956 ft. Miscel. 69.9 59.8 10.1 .518
---------------------------------------------------------------------
97 ... ... Mean 74.6 58.3 16.3 .495
---------------------------------------------------------------------

Dorjiling.--Humidity 0.828 Calcutta 0.590
,, Weight of vapour 2.75 gr. ,, 5.40 gr.


MARCH
DORJILING
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
10 Jillapahar, 7430 ft. 9.50 a.m. 44.2 42.7 1.5 .290
8 1850 ... Noon 45.5 43.0 2.5 .293
5 ... ... 2.40 p.m. 46.4 44.0 2.4 .303
8 ... ... 4 p.m. 45.5 43.4 2.1 .297
6 ... ... Sunset 43.1 41.5 1.6 .278
3 Pacheem. 7258 ft. Misc. 44.8 44.6 0.2 .310
---------------------------------------------------------------------
40 ... ... Mean 44.9 43.2 1.7 .295
---------------------------------------------------------------------

CALCUTTA
No. of
Obs. Place Elev. Hour Tp. D.P. Diff. Tens.
---------------------------------------------------------------------
10 Jillapahar, 7430 ft. 9.50 a.m. 81.6 64.1 17.5 .602
8 1850 ... Noon 88.2 57.0 31.2 .472
5 ... ... 2.40 p.m. 91.3 53.2 38.1 .416
8 ... ... 4 p.m. 90.1 52.0 38.1 .399
6 ... ... Sunset 82.9 63.7 19.2 .590
3 Pacheem. 7258 ft. Misc. 85.0 74.8 10.2 .848
---------------------------------------------------------------------
40 ... ... Mean 86.5 60.8 25.7 .555
---------------------------------------------------------------------