Observations made at Leith. 
179 
continued to play with considerable brilliancy for more than an hour. No 
other colour than yellowish-white could be perceived at this time — We have 
exerted ourselves to collect such information from various parts of Scotland, 
as might enable us to determine the height of this interesting meteor. Al- 
though, however, we find that it was observed, and that, too, with extreme 
interest, throughout the Lothians, Fifeshire, and Forfarshire, yet we have 
not been able to obtain data sufficient for our purpose. It is said to have 
been seen exactly in the zenith in the middle of Fife ; and 6° or 7° south 
of the zenith at Dundee. In every place, however, where it was observed, 
it seems to have presented nearly the same general aspects and changes, 
and to have had no motion en masse. No aurora was perceived on the same 
evening at Inverness, probably owing to the sky having been obscured by 
dense cumulo-strati . — Several arches of a similar nature have been observed in 
this island during the last twenty years ; one of the finest of which was per- 
haps that seen on the 11th of September 1814 (Ann, Phil, vol. iv. p. 363.): it 
differed, however, from the one now described, in having had a distinct mo- 
tion towards the south : its height seems to have been about 74 miles. An- 
other arch was seen at St Andrew’s, &c. December 1817, and another on the 
18th October 1819, both of which were probably very similar to this one. 
20th — Mean Temp. 41°.25. Bar. 30,62. Wind SW. gentle. Foggy. 
23 d . — For several days past, a great many long, dense strati have lain over 
the surface of the Frith of Forth : they are generally of a white colour, and 
extremely well defined ; their motion is very sluggish ; their upper surface is 
seldom elevated more than 60 or 80 feet above the level of the water. Seve- 
ral curious optical phenomena, depending on the unequal refraction which 
these occasion, have occurred. 
28 tk — The following observations on the force of Solar Radiation, were 
made this day. The Thermometer exposed to the sun had its bulb covered 
with black woollen-stuff : 
Ther. 
in shade. 
in sun. 
9 h 30' a . m. 
43°.0 
86°.0 
Clear ; a few cirro-strati. 
10 
0 ... 
45.0 
87.O 
Ditto. 
10 
30 ... 
47-0 
89.0 
Ditto ; sky light-coloured. 
11 
0 ... 
48.0 
102.0 
Ditto ; sky darker ; cumuli. 
11 
40 ... 
49.0 
90.0 
Sun frequently obscured by 
cumuli. 
12 
0 ... 
49.5 
98.0 
Clear ; a few cumuli. 
1 
0 P. M. 
51.0 
94.0 
Ditto, ditto. 
2 
30 ... 
49.0 
84.0 
Clear, fine. 
APRIL. 
Results. 
Temperature. 
Fahr. Ther. 
Mean of the Month,.... 
Maximum by Reg. Ther, 
Minimum by ditto, 
Range 
Mean of the extremes, . 
M 2 
