of Edinburgh, Session 1885-86. 
511 
Radius from centre of sun to point 
where the two reds overlapped, 
21° 42' 
21° 49' 
22 ° 0 ' 
22 ° 0 ' 
22 ° 0 ' 
22 ° 0 ' 
The upper arc was very distinct, but the blue in it was fainter than 
the blue of the main circle. The radius of upper arc was not de- 
termined. Double solar corona at ll h . Radius of outer red, 
40° 53'; radius of inner red, 2° 55'. From 19 h to 2 3 h lunar halo 
on cirrus clouds, and for most of the time misty corona also on 
cirrus. At 19 h the following measurements were made : — 
Corona. 
Outside radius, . . 4° 20' 
4° 28' 
,, ,, . . ^ 
This corona was a mere bluish 
space, with a red rim on out- 
side edge. 
Radius, 
>> 
jj 
Halo. 
24° 2 8 
23° 17' 
22° 24' 
22° 36' 
23° 30' 
23° 44' 
At 20 h the measurements got were — Radius of corona, 2° 59' ; halo, 
21° 13'. 
Feb. 16, 1886. — At 2 h , misty-looking lunar corona Taint blue 
on cirro-cumulus; colours as in diagram. Radius of Yellow 
red, 1° 43'. ^ 
Feb. 17, 1886. — At 3 h , blue corona round moon. Misty corona 
on cumulus at night ; no measurement made. 
Feb. 25, 1885. — Lunar corona at 5 h . Colours were in the fol- 
lowing order out from moon : — 
}) White. Yellow. Red. Violet. Green. Yellow. Red. 
Feb. 26, 1886. — At 12 h solar corona. Double rings rapidly 
varying in size. Radius of outer red, 8° 22' ; radius of inner red 
(3 measurements), 4° 34'; 4° 23'; 3° 38'. Similar corona at 13 h , 
but outer ring very faint. Radius of inner red, 3° 3' ; 2° 47' ; 
3° 25 ; 3° 10' ; 3° 2' ; 2° 24'; radius of outer red, about 5° 30'. 
March 5, 1886. — At S h fog bow; corona (3, 4, and 5 rings) 
and glory (2 and 3 rings) on passing fog, — all too fleeting to 
measure. 
