76 Barometric Observations. 
Hour. |Barom. q Wind. State of the Weather. 
= 
= 
& 
SS 
ad [al al 
1821. A.M), ee with a brisk wind, and 
sd 
im 
jdet. 2 
ches. 1 
h inear cirri above an extensive 
July Ith, 8h130-162 68 60 o4 N.N.W bed of cirrocumulus, floating in the 
direction of the wind. 
The same modifications as above, 
with the addition of nascent cumuli 
around the horizon—and breezy 
at intervals. 
f Lofty cumuli apparently inosculat- 
ing with cirrocumulus, which lat- 
10 |30-16) |65/67/40|W.N.W | ter has changed from a bright to 
9 |30-165 |60)62)/50} N.W 
a watery colour, more particularly 
the part not in the immediate vi- 
L cinity of the sun. Light airs only. 
pCa, and overcast with dark cu- 
nulostratus, except two or three 
small openings, which showed 
that the sky had altered its colour 
from a light to a dark blue: and 
30-159 (67/69138|W.N.W that a slight condensation of the 
‘ : vs ""l) superior modifications of cloud 
was going on, was proved by the 
sinking of the Barometer and 
Thermometer, and the receding 
[ of the index of De Luc’s whale- 
bone hygrometer. 
{ The sky nearly as at 11, but since 
that hour two very black nimbi- 
ferous clouds have passed over 
12 |30:148 |66|66/40/W.N.W.|{ towards the 8.S.E., with only a 
few drops of rain, scarcely per- 
ceptible on the leads of the Ob- 
| servatory. 
] 
—_ 
Pocklington, Yorkshire, July 11, 1821. 
Si1r,—I again trouble you with some more meteorological ob- 
servations made at this place, on Monday the 9th of this month. 
I am, sir, yours truly, 
WixuiaM RoGERson, jun. 
Thermom. 
Clock. |Barom.} in | out | Wind. Weather. 
doors|doors 
85/29-980| 64-0 | 59-0 | N.W. \Clear ee cloudy: mi/d and alent. 
9 |29-978 | 63-4 | 59-8 |W. by N. lSunhe broken dense clouds: gentle 
10 |29:979| 63:0|}60-2} W. Ditto. [ breezes. 
1] |29-983| 63-2|615] N.W. Some thin wh. clouds: gent. breezes. 
12 |29-983| 63-6 | 61-4} W.N.W. Broken dense clouds: gentle breezes. 
London, 
