of the Atmosphere. 425 
dise was more steadily upward, while the breeze still continued. 
The clouds were observed to move from W.N.W. At 6.80 P.m., 
a gentle breeze from W.S.W.; sky covered with light clouds ; 
steady upward tendency of the current; very little waving of 
trees. The flanges sometimes retained the same inclination for 
a quarter of an hour. 8.30 p.m., wind more brisk from 
the west, but the disc still steady; sky beginning to become 
overcast. 
“July 3, 8 a.m.—Wind S.W. and S.; air filled with heavy 
clouds, floating at comparatively short distances from the earth. 
Strong breeze with alternate up and down currents, the down- 
ward currents lasting but for very short periods. 9.15 a.m., 
wind S.S.E. with light rain. Just before the rain the down- 
ward currents became more prominent, the clouds moved from 
S.W. 10.30 a.m., wind S8.S.W. with alternate upward and 
downward currents. 
“ July 5.—Fine morning, clear sky, with a few scattered cu- 
muli; gentle breeze from 8.W.., alternating currents upward pre- 
dominant. 2 p.m.—Cloudy sky, with the air almost still; slight 
vertical currents. Rain from four to seven o’clock. 9 p.m.— 
Wind N.N.W., clearing the sky; temperature rapidly falling, 
with downward currents. Towards midnight the sky was 
almost perfectly clear, and the wind more westerly. 
“July 6, 9 a.m.—Very strong breeze from N.W., with vertical 
currents and rain. The alternations were sometimes rapid, and 
the apparent angle of inclination very great; the disc rarely 
continued steady in an inclined position, although it sometimes 
remained for long intervals in a perfectly horizontal position, 
with a strong wind. Rain appeared to produce no remarkable 
effect on the flanges, for it seemed to be shaken or blown off. 
About 3 p.m., the wind was strong and steady from N.N.W.; the 
movements of the flange were as follows during the course of a - 
few minutes :—Downward, 14 minute; upward, 4 min.; level, + 
min. ; oscillating, 2 min.; down, } min.; up, 4 min.; oscillating, 
4 min. ; level, } min.; up, } min.; oscillating, } min. ; level, + 
min. ; up, 1 min.; down,} min. The air was gradually filling 
with broken masses of cumulo-stratus clouds. As they appeared 
to approach the earth, downward oscillations of the flange be- 
came more manifest. Approaching four o’clock the wind blew 
irregularly, with violent and sudden gusts of short duration. At 
64 p.m., a strong breeze, with currents having a downward ten- 
dency ; towards seven the sky became a little more clear, and the 
currents appeared to be alternately upward and downward, with 
short intervals of 10 or 12 seconds. At 7.15 p.m. the wind 
was from N.W., with alternate currents, the upward predomi- 
nating, while the sky was becoming perceptibly more clear. 
