ON FIVE BALLOON ASCENTS IN 1863. 441 
Balloon Ascent, from the Crystal Palace, April 18, 1863. 
mometers (free). Negretti Dry and Wet Thermometers (aspirated). Hygrometers. 
and 
Commie Daniell’s. | Regnault’s. 
Diff. |Dew-point.| phermo- Dry. Wet. Diff. |Dew-point. 
meter. Dew-point, | Dew-point. 
° ° ° ° ° ° ° ° ° 
2 48°4 
61 45°5 
55 45°4 
6:2 431 
6:0 42'2 
6°2 36°4. 
6-2 34°1 47°0 
61 27°5 
3°5 33°6 
18 32°7 
3 311 
Saas fl seness 32°38 
pena 32°2 
6-2 I2'1 
a3 539 315 
sac) | RR 23 
Agios . cena 23°0 
seeeee vee 23°2 
Hen eaeees 21°70 
. eee 20'0 
42 |—I9g°0 17° 
6:0 +=|—20°6 
Bae \—49°3 
72 |—49°5 
oa. |—53°8 
8. Sp 10. 11. 12. 13. 14, 15, 16. 
(11) Beyond H and to A in sky spectrum, under and near the sun, lines beautifully de- 
fined ; great change of focus to see A and H. Sky spectrum at some distance from the sun, 
less than G; can see B and several lines beyond. 
(12) Above the clouds ; sea of clouds below ; Crystal Palace seen clearly ; wind N. 
(13) Ozone 3 by powder ; o by paper. 
(14) Balloon full; no sky spectrum; dark. (15) Bluesky above. (16) Gas out, 
(17) Spectrum far beyond B, up to A when near sun. (18) Gas clear, 
(19) Sky spectrum short at a little distance from sun. 
(20) A stream of cold to sense. (21) Minimum thermometer 11°2, 
(22) Lurch in balloon ; spectroscope swung round, and from some cause the solar radia- 
tion thermometer fell over the side of the car; I looked down, but could not see it. 
(23) General tinge over countenance ; heart slightly affected ; largest field appeared three 
inches square; lowered grapnel. No spectrum; no lines; looking at sky, which was quite 
bright from 14 47™ to 15 49™, with the exception of a few seconds before and after 14 48™, 
