512 
Proceedings of the Royal Society 
March 7 } 1886. — At 7 h thin pallium over sky just above the level 
of the hill tops round. At 7 h 1 3 m the sun broke through this cloud 
layer, and at 7 h 16 m a white beam was seen stretching vertically 
downwards from sun to edge of Ben Nevis (to eastward). It passed 
through a stratus cloud. Corona observed at the same time. At 
7 h 24 m the beam was again seen. At 10 11 double solar corona was 
observed. The following measurements were made : — 
Radius of inner red, 3° 46' 
33 
33 
3° 37' 
3° 30' 
33 
33 
33 
33 
33 
33 
33 
4° 1' 
3° 42' 
3° 42' 
2° 50' 
Radius of outer red, 7° 30' 
33 
33 
33 
33 
33 
5° 34' 
6° 29' 
6° 35' 
N.B . — The last measurement of the inner red and the second 
of the outer were taken about the same time. 
Solar halo observed at ll h , at 12 h , and again at 13 h . The 
following measurements were made: — 
T— * 
H 
<1 
At 
12 h . 
At 
13 h . 
Radius, 
23° 
30' 
23° 
44' 
21° 
48' 
22° 
24' 
33 
22° 
0' 
21° 
13' 
21° 
24' 
23° 
3' 
Extreme inside, 
21° 
13' 
22° 
12' 
22° 
24' 
21° 
48' 
33 
outside, 
25° 
44' 
21° 
13' 
22° 
0' 
22° 
12' 
22° 
12' 
March 13, 1886. — Fleeting lunar corona, sometimes single and 
sometimes double, formed on scud at night. 
Notes. 
Whether specially mentioned or not, all the measurements were 
made by the stephanome. Up to and including that on July 3, 
1885, the sliding rings (lj-inch and 8-inch) were used; after that 
the sliding bar with points on it. 
The measurements made with the bar are considerably more accu- 
rate than those with the rings, the bar being more easily handled, 
and the points capable of more accurate adjustment to the object 
observed. 
The type of corona seen on August 22, 1885, is of very common 
