~~ pmol 
ON FIVE BALLOON ASCENTS IN 1863. 507 
At 5" 28™ p.m., at 1044 feet. In clouds. 
At 5" 29™ 30° p.m., at 948 feet. Still in cloud. 
At 5" 33™ p.m., at 1179 feet. Scud far below. 
At 5" 33™ 30° p.m., at 1507 feet. Clouds above are darker than those 
below. 
At 5° 37™ p.m., at 1330 feet. In cloud, very dark. 
DrREcTIoN oF THE WIND. 
Marck 31. 
At 4" 58™ p.m., at 18,302 feet. Moving 8.W. 
At 4" 58™ 30° p.m., at 17,097 feet. Changed our course, moving N.E. 
At 5 2™ p.m., at 17,636 feet. In a S.W. current, moving N.E. 
At 5" 12™ p.m., at 20,865 feet. In a nearly westerly current. 
At 5" 42™ 30° p.m., at 15,714 feet. In a westerly current. 
At 6" 15™ p.m., at 4441 feet. Fell in with a S.E. current; are over 
Ilford. 
At 6" 16™ p.m., at 5168 feet. Changed our course, moving back again. 
April 18. 
Before starting the wind was N.E. 
At 1" 30™ p.m., at 11,055 feet. The wind changed to N. 
June 26. 
Before starting the wind was blowing W.S.W. strongly. 
At 1" 32™ p.m., at 17,144 feet. Apparently calm. 
July 11. 
Before starting the wind was E. ‘ 
At 4" 59™ 30° p.m., at 2633 feet. Balloon entered a N. current. 
At 7" 14™ p.m., at 1876 feet. Balloon entered an E. current. 
At 7° 47™ p.m., at 1483 feet. Balloon again entered an E. current. 
At 7" 56™ 45° p.m., at 1020 feet. Balloon entered a 8.E. current. 
At 7° 57 p.m., at 1000 feet. Balloon changed its course, moving W. 
July 21. 
Before starting the wind was §. by E. 
At 5" 7™ p.m., at 2642 feet. Balloon entered aS.W. current, moving N.E. 
At 5° 9™ 30° p.m., at 1840 feet. Balloon turned to move back again. 
VELOCITY OF THE WIND BY THE Battoon, AND BY Rosryson’s ANEMOMETER 
AT THE Roya OpsERVATORY, GREENWICH. 
On March 31 the balloon left the Crystal Palace, Sydenham, at 4" 16™ p.m., 
and fell at Barking, in Essex, a point 15 miles from the place of ascent, at 
6" 30" p.m. Neglecting all motion of the balloon, excepting the distance 
between the ‘places of ascent and descent, its hourly velocity was 7 miles ; 
the horizontal movement of the air at Greenwich, as shown by Robinson’s 
anemometer, was 5 miles per hour. 
On April 18 the balloon left the Crystal Palace at 1" 16™ p.m., and de- 
scended at Newhaven at 2"46™. The distance is about 45 miles in 14 hour, 
or at the rate of 30 miles per hour. Robinson’s anemometer had registered 
less than 2 miles per hour. 
