ON NINE BALLOON ASCENTS IN 1863 AND 1864. 225 



Balloon Ascent, from the Eoyal Arsenal, "Woolmcli, January 12, 1864. 



mometers (free) . 



Diff. 



Dew-point 



Gridiron 

 Thermo- 

 meter. 



Dry and Wet Therms, (aspirated). 



Dry. 



Wet. 



Diff. 



Dew- 

 point. 



Hygrometers. 



Daniell's. 

 Dew-point. 



Regnault's. 

 Dew-point. 



Delicate 

 'Blackened 

 iBulb Ther- 

 mometer. 



3"3 



3'S 



IS 



3° 



*-s 



2"S 



IS 

 i'3 



2'i 



2' I 

 2*1 



2-4 



2'0 



3-0 



2"I 



27 



2-3 

 I 9 



2"I 

 2'1 



2-3 

 2-3 



*7 

 27 

 07 



07 



I '2 



20 



0-8 



0-4 



0-2 

 0'2 

 0'2 

 0'2 



+ 2'4 



- o"S 



+ 

 + 



8-6 



3-S 

 3-8 



i"3 

 2-9 



13 



7-8 



+ 6-4 



- 17 



- 17 



- 2-1 



- 2"4 



- a"S 



- I2'2 



- 5'* 

 -11-5 



- 8-6 



- S'S 



- 7"a 



- 7-3 



- 7'4 



- 7-4 

 -12-5 

 -127 

 + 7-1 



8-3 

 + 4-5 



- 1-4 

 + 9"o 

 14-3 

 14s 

 i4'S 

 14' S 

 14s 

 148 



24-5 



9. 



23'0 



20'0 

 20"5 

 20'5 



2I-0 



20"0 



198 



I9"2 



i7'o 

 i8-S 



18s 



18s 



3-2 



08 

 35 



2'0 



2-S 

 2-5 



i3'S 



-7'5 

 4'S 



i"5 

 I'S 



15-2 

 15-0 



II-2 



2* I 



— 2*0 



10. 



11. 



12. 



13. 



14. 



15. 



16. 



H'5 



20'5 



205 



20'5 

 20'5 



21'0 

 2I*0 



20'0 



17*2 

 17-1 

 l6-2 



15-2 

 150 



i4'o 



165 

 i6-2 



l6'2 

 l6'2 



i6-s 



17. 



(12) Hoar-frost on ropes and all round the neck of the balloon in long fringes. 



(13) Earth nearly obscured. (14) Filled one air-bag ; Eegnault failed again. 



(15) Fine anow under us. 



(16) Filled the second bag with air ; can rise no higher. (17) Snow granular. 



(18) Eepeated application of ether to Daniell's Hygrometer was not followed by the usual 

 deposition of dew on the blackened bulb. (19) Babbits heavy and dull. 



(20) Snow fine and thin. (21) Dog whining. (22) Snow still granular. 



1864. o 



