Meteorohgicdl Observations made at Leith. ■ 395 
pressure seems to have occurred at the same time over the whole island, and 
the western shores of the Continent. 
IQth — The pressure gradually and regularly diminished till this day, when 
it began again to increase. The weather during the whole week was very fine. 
Temp. 36°-56“. 
18^^ — TJie pressure diminished again on the 17th, and this morning the 
minimum for the month occurred, 28.80. Wind W. brisk. Heavy rain fell 
•during the day. At 10 a. m. a remarkably distinct convergence of the solar 
beams was seen, under the usual circumstances. 
2'Jth — For several days about this period, the temperature was very va- 
riable. Excepting on the three first days, no storms of wind occurred during 
the whole month. 
FEBRUARY. 
Results. 
1 . 
Mean of the month, 
Maximum observed, 
Minimum observed, 
Itange, 
Mean of extremes,.... ......... 
2. Pressure. 
Mean of the Month, 
Maximum observed, 
Minimum observed, 
Hange, 
Fahr. Ther. 
.. 39°.825 
.. 57.000 
.. 21.500 
.. 35.500 
.. 39.250 
Inches. 
... 29.956 
... 30.410 
... 29.140 
... 1.270 
3. Humidity^. , Fahr. Ther, 
Mean difference during the month between the two Ther- 
mometers, 2®.99 
Maximum ditto,.., 0.75 
Minimum ditto, 0.75 
4. Uain, 2.89 inches. 
5. Winds, NE. 1 SE. 6 SW. 13 W. 5 NW. 3 ... days. 
Remarks, 
This month has been a very pleasant one, mild and dry. Pressure re- 
markably steady for the season, and gradual in its variations. No storms of 
wind occurred. 
3c?.__A light shower of snow fell, 'which soon dissolved; cirri very prevalent. 
7^/i. — Two colourless rainbows were observed to-day, one at 9 a. m. and the 
other about noon : the primaries only v/ere seen. 
17^/4 The sky at sunrise this morning presented an uncommonly splen- 
did appearance, being covered with long cumuli and cirro-strati, decked in the 
richest tints of the spectrum, the green not excepted : heavy nimbi passed in 
rapid succession, discharging a few shpwers of rain till about 3 p. m. About 
4 p. M. when the sky was covered by a thin sheet of cirro-stratus and floating 
Kud-douds^ and when a large nimbus, advancing from the west, was obscuring 
