ON FIVE BALLOON ASCENTS IN 1868. 443 
Balloon Ascent, from the Crystal Palace, April 18, 1863. 
mometers (free). Bearets Dry and Wet Thermometers (aspirated). Hygrometers. 
an : aan 
> ; 
bere : Daniell’s. Regnault’s. 
Diff. |Dew-point.) ppermo- Dry. Wet. Diff. | Dew-point. 
meter. | ; Dew-point. Dew-point. | 
EE 
i. ee er 
14. 15. 16. 
‘the sun; and when a beam of light came from the sun itself, the whole spectrum was 
-yisible, the nebulous line H and a good way beyond at the violet end, and A at the red 
end, with innumerable lines between, particularly at the violet end, all sharp and well- 
defined ; on the balloon revolving the spectrum was gradually lost, till none appeared at the 
sky opposite the sun. I scarcely moved my eye from the telescope during three revolutions: at 
the first I examined the violet end; next the red end; and then the whole spectrum. 
~ (11) Looked at sun with red, blue, and yellow glass for anything like prominences ; edge 
without appendages. (12) No change on paper in one minute. 
(13) Mr. Coxwell uneasy; opened the valve freely, and we descended rapidly. 
. (14) No ; cov’ not get the sun. i 
(15) The readings of the two barometers are discordant I cannot say which is correct: - 
