Page:Blackwood's Magazine volume 001.djvu/447
the greatest daily heat is only half a degree more; and that the actual temperature at 10 a. m. is even lower this year than last. The thermometer last year stood once at 73, and once at 72, during the month of June; this year it stood once at 76, once at 73, once at 72, once at 71, and once at 70½°. During June 1817, the temperature rose 18 times to 60 and upwards; but during the same month 1816, it rose in the same way 22 tunes. From various other circumstances that might be stated, we suspect that the present year has appeared warmer, only because there has been more sunshine, which has of course produced an astonishing difference in the appearance of the crops. The moist state of the atmosphere, too, might perhaps prevent evaporation at night, to the same extent as prevailed last year, which would of course prevent also the same depression of temperature. This conjecture is confirmed by two facts. In the first place, the average height of the hygrometer, at 10 p. m. for June last year, was 14¼—this year it is only 10½; and in the second place, the difference between the mean temperatures of the two years is almost wholly owing to the difference between the temperatures of the nights.
Meteorological Table, extracted from the Register kept on the Banks of the Tay, four miles east from Perth, Latitude 56° 25′, Elevation 185 feet.
June 1817.
Means.
THERMOMETER. Degrees.
Mean of greatest daily heat, 62.983
cold, 48.366
temperature, 10 A. M. 57.233
10 P. M. 51.585
of daily extremes, 55.675
10 A.M. and 10 P. M. 54.408
BAROMETER. Inches.
Mean of 10 A. M. (temp. of mer. 59°) 29.643
10 P. M. (temp, of mer. 59) 29.662
both, (temp, of mer. 59) 29.652
HYGROMETER (LESLIE'S.) Degrees.
Mean dryness, 10 A. M. 24.255
10 P. M. 10.500
of both, 17.366
Rain in inches and decimals, 4.345
Evaporation in ditto, 2.050
Extremes.
THERMOMETER. Degrees.
Greatest heat, 25th day, 76.000
Greatest cold, 14th, 41.000
Highest, 10 A. M. 25th, 70.500
Lowest ditto, 14th, 49.500
Highest, 10 P. M. 24th, 62.000
Lowest ditto 14th, 46.000
BAROMETER. Inches.
Highest, 10 A. M. . 16th, 30.070
Lowest ditto, 14th, 29.110
Highest, 10 P.M. 15th, 30.160
Lowest ditto, 13th, 29.200
HYGROMETER. Degrees.
Highest, 10 A. M. 5th, 45.000
Lowest ditto, 28th, 5.000
Highest, 10 P. M. 7th, 22.000
Lowest ditto, 19th, 2.000
Fair days 12; rainy days 18. Wind west of meridian, including North, 14; East of meridian, including South, 16.
Meteoroligical Table, extracted from the Register kept at Edinburgh, in the Observatory, Calton-hill.
N. B.—The Observations are made twice every day, at eight o'clock in the morning, and eight o'clock in the evening.
Ther.
Barom.
Attach. Ther.
Wind.
Ther.
Barom.
A ttach Ther.
Wind.
June 1 !
M.49 E. 49
29.551 .389
M.54 E. 55 /
,, ... [Fair, and N ' w - mild.
June 16 1
M.51 E. 54
29.982 .811
M.55)
E.56/
W.
Cloudy, with showers.
2 {
M.51
E. 48
.3511 M.55) .244;E. .55 /
Cble.
Cloudy.
"
M.59 E. 57
.762 .698
M.621 E.62/
Cble. Fair.
'{
M.50 E. 51
.160JM.541
.175E.55/
S.W.
Showers.
18{
M.49
E. 19
.614 .534
M.58 E.57f
E. ' Fair.
- {
M.55 E. 4!)
J8.70-1 M.55 29.186 E. .53 >
w.
Showers.
,9{
M.49
E. 56
.502
.579
M.54 K. 61 /
N E !Fog A.M. '" thmidrrPM.
4
M..53 K.51
.561 M.57 .555 E. 55 f
Cble.
Fair.
20 {
M.57 K. 5.1
.618 .704
M.59 t E. 60 J
N'. E.
Fair, fog in morning.
{
M.5-1 E. 55
.58* M.59 1
.582 E. 59 /
W.
Fair.
21 {
M.51 E. 51
.812 .861
M.58 E. CO/
E.
Fog morn, mild dav.
M.55 E. 55
.430|M.58 .416IE. 59/
W.
Rain.
22 1
M.57 E. 60
.926 .917
M.65) E. 61 J
E, 'Fog morn, fair & mild.
M.49 E. 49
.319 .565
M.5G E. 56)
S.W.
Showeiswith thunder.
23{
M.fiO E. 56
.917 .842
M.64) K. 64 j
,,. (Fog morn, fair.
M.55 E. 66
1.57 .481
M.60 E. 60 /
E.
Fair A. M. rain 1*. M.
24 {
M.61 E. 61
.761 .691
M.66) E. 64 /
... ! og morn, lair.
io{
M.55 E. 50
.517
.669
M.591
E. 58 i
E.
Hail, with thunder.
25 /
M.61 E. 65
.691 .705
M.68 E. 70 /
Cbk-.
Fair.
{
M.50 E. 55
.722
.i;i3
M.55) E. 60 /
W.
l-'air, and very mild.
26 {
M.65 F. 54
.665 .480
M.71 I E. 61 J
E.
Fair.
12{
M.49 E.51
.328 .290
M.54)
E. 66 f
s. w.
Itaiii.
27{
M.55 E. 54
.413 .566
M.61 E. 62 J *"
Cloudy.
B
M.54 E.47
.290JM.59) 28.902 E. 52 (
E.
Rain.
{
M.56 E 55
.314
.3fi6
M.61 ) -, w E.6l| ( l)k> -
liain.
"{
M.45
E 51
.911 29.568
M.60 E.54J
N.W.
Rain.
29 1
M.60 E. (>0
..5,1.,
.501
M.6.5 ) t. tfl /
V. J'air.
{E1S|
.840 .982
M.56) E.59/
W.
Fair.
30 1
M.58 E. 62
.'.'05 .416
M.61 ,.,
E.cs/r-
Fair,
Hain .294 inches.