ON THREE BALLOON ASCENTS IN 1864 AND 1865. 159 



Balloon Ascent, from Woolwich Arsenal, December 30, 1864 (continued). 



momcters (free) 



Difference. 



i - 5 

 r6 



'•5 

 i-8 

 r6 

 i-8 

 r8 

 r8 



**7 



Dew-point, 



36-2 



33 - 4 



34-0 



34-2 

 34-0 



339 

 33'9 

 339 



34-z 



Gridiron 

 Thermo- 

 meter. 



Dry and Wet Therms, (aspirated). 



Dry. 



Wet. 



Diff. 



Dew- 

 point. 



Daniell's. 



"Dew-point. 



Hygrometers. 



Regnault's. 

 Dew-point. 



Delicate 



Blackened 



bulb Ther 



mometer. 



Balloon Ascent, from Woolwich Arsenal, February 27, 1865. 



18-5 



34'2 



29*0 



i9'o 



52'0 



52 - o 

 5 r 5 



35-0 



9. 



10. 



11. 



12. 



13. 



14. 



15. 



1G. 



17. 



(14) We are in cloud, and over water; the clouds below are moving much more quickly 

 than we ; wind more westerly. 



(15) Sun shining faintly ; clouds at least three or four miles above us, moving W. ; we 

 are in a N.W. current. 



(1(3) Clouds below appear to be moving N. ; we are moving towards the E. 



(17) The clouds below are moving at right angles to us. 



(18) Over Barking level ; Tilbury line to our left or N/.'; clouds have a very fine purple 

 tm ^s 0v ^ r a - Tery beautiful ey en surface ; N. gloomy and dark ; great contrast. 



(19) Sensibly warmer. 



