ON NINE BALLOON ASCENTS IN 1863 AND 1864. 229 



Balloon Ascent, fi-om the Eoyal Arsenal, Wool-\\ach, January 12, 1864. 



mometers (free). 



Diff. 



1-8 



°'5 

 0-6 



Dew-point 



357 

 37-6 



39'° 



Gridiron 

 Thermo- 

 meter. 



Dry and Wet Therms, (aspirated). 



Hygrometers. 



Dry. 



Wet. 



Diff. 



Dew- 

 point. 



Darnell's. 

 Dew-point. 



Regnault's. 

 Dew-point. 



Delicate 

 Blackened 

 Bulb Ther- 

 mometer. 



BaUoon Ascent, from the Eoyal Arsenal, "Woolwich, April 6, 1864. 



31 



2-8 



35 

 35 



3-5 

 3-3 



3'3 

 3-6 



17 

 10 

 08 



13 



06 



0-9 



2-0 



i'9 



I'O 



J'5 

 I'l 



13 



4-2 

 59 

 5'» 

 4-2 



5-4 



39-6 

 4i"o 

 3S-5 

 385 



37-9 



377 



346 

 326 



33-8 

 34-0 



339 

 3i'o 



3i'5 



303 

 287 

 312 

 33*4 



32"2 

 285 



35'4 



30-6 

 25-3 



22'6 

 22-6 

 20"0 



41-8 



34-5 



32*0 



33*3 



34-2 

 34-8 



35-5 



360 



36-0 



36*1 



42-5 

 40'o 



32'o 



35-0 



327 



33-a 



33-0 



25-0 



43 'o 



359 



34' I 



35"5 



38-1 

 362 



34-8 



42'I 



35"i 



9. 



10. 



11. 



12. 



13. 



14. 



15. 



16. 



17. 



(}f) ^"^cl} liglite'*; , , (13) In mist; can see the sun's outline. 



(14) Two layers of cloud. (15) Goat Jess uneasy. 



(16) Can see a very large oval in the cloud, with balloon in the centre ; no prismatic 



*^!m"c.i. "P ^""^^^ ''' *-^^ ^^°^^''- (^'^) ^""^ <=^*'^''*'^- (18) Immense halo upon the cloud 

 (ly) bhadow of balloon on clouds ; very fine; blue sky. 



(20) Beautifxil sound heard when closing the valve. 



(21) Can feel wind pressing against us. (22) Sun warm. 



