ON NINE BALLOON ASCENTS IN 1863 AND 1864. 313 



Velocity of the Wini) by the Balloon, and by Eobinson's Anemometer 



AT THE EOTAL ObSERTATOET, GEEEN^iVICH. 



On September 29 the balloon left Wolverhampton at 7"" 43™ a.m., and fell 

 near Sleaford, a point 95 miles from the place of ascent, at 10'' 30"' a.m. 

 During this time the horizontal movement of the air was 38 miles as regis- 

 tered at Wrottesley Observatory. 



On October 9 the balloon left the Crystal Palace at 4" 29"' p.m., and de- 

 scended at Pirton Grange, a point 35 miles from the place of ascent, at 6'' 30°' 

 p.m. Robinson's anemometer during this time registered 8 miles at the Royal 

 Observatory, Greenwich, as the horizontal movement of the air. 



On January 12 the balloon left the Royal Arsenal, "Woolwich, at 2'' 8" p.m., 

 and descended at Lakeuheath, a point 70 mUes from the place of ascent, at 

 4h j^gm p_jjj_ j^^ ^jjg Royal Observatory, by Robinson's anemometer, during 

 this time the motion of the air was 6 miles only. 



On April 6 the balloon left the Royal Arsenal, Woolwich, at 4'' 8"' p.m. 

 Its correct path is not known, as it entered several different currents of air, 

 the earth being invisible owing to the mist ; it descended at Sevenoaks, in 

 Kent, at 5'' 17'" p.m., a point 15 miles from the place of ascent. 5 miles was 

 registered during this time by Robinson's anemometer at the Royal Observa- 

 tory, Greenwich. 



On June 13 the balloon left the Crystal Palace at 7'' 0"^p.m., and descended 

 at East Hornden, a point 20 miles from the place of ascent, at 8'' 15°' p.m. 

 Robinson's anemometer during this time registered 17 mUcs at the Royal 

 Observatory, Greenwich. 



On August 29 the baUoon left the Crystal Palace at 4'' 6" p.m., and de- 

 scended at Wybridge, at 5" 30"' p.m., a point 13 miles from the place of 

 ascent. During this time 15 miles was registered by Robinson's anemometer 

 at the Royal Observatory, Greenwich. 



Direction of the Wind. 



September 29, 1863. 



Before starting, the wind was from the S.W., and remained so during the 

 ascent and descent of the baUoon. 



October 9, 1863. 

 Before starting the wind was from the S.E. 



At 4" 34'° p.m., at 3700 feet. Changed dii'cetion from N.W. to N. 

 At 5" 13°' p.m., at 2715 feet. Moving IST.W. again. 



January 12, 1864. 



At 2" 9'" p.m., at 655 feet. Changing direction towards the S.W. ; wind 

 N.E. 



At 2" 10" p.m., at 1328 feet. Moving W. ; wind E. 



At 2" 11"' p.m., at 1518 feet. Wind S.W. 



At 2" ig™ p.m., at 2204 feet. Wind stiU S.W. 



At 2" 32°' 30' p.m., at 5401 feet. We are now going northwards ; wind S. 



At 3" 3™ p.m., at 8080 feet. Changed direction: moving N.N.E.: wind 

 S.S.W. 



At 3" 20"^ p.m., at 10,017 feet. Entered a S.S.E. current. 



