180 Col. R, Wright's Meteorological Observations in Colombia. 



Difference betwixt this result and that of the barometer 3^ 

 lines. Satisfied with this commencement, or dawning of a 

 new theory, he began a series of experiments in the moun- 

 tains near Popayan, taking this city as the centre of his la- 

 bours, and fixing the elevation of the barometer at 22'* 111* 2, 

 and boiling water at 75°*65 of Reaumur. 



At a spot named Las Juntas I made my first observation. 

 The barometer stood at 2P 9^, or 14I lower than atPopayan ; 

 the heat of boiling water was 74;°"5 Reaumur. Then 



Height of the barometer in Popayan 22i 11-2 B.W. 75°-65 

 at Las Juntas 21 9 74.°-50 



1 2-2 1°-15 



1 2-2 = U>-2 : l°'15:: 12^l^ f/ '^^ = 0°'971 of Reaumur 



14'2 



for 12i- of the barometer. 



I ascended to Paisbamba, a small farm five leagues south 

 of Popayan. Barometer 20^ 9H. B.W. 73°-5. 



Barometer in Popayan 22' 1 li-2 B.W. 75°-65 

 in Paisbamba 20 9 -1 B.W. 73 -50 



Differences 2 2-1 2° 15 



12 X 2*15 

 2 2-1 = 261-1 : 2°' 15 : : 12 — = 0°-98S of Reaumur, 



for 12 lines of the barometer. 



I ascended a hill E. of Paisbamba called Sombreros. Baro- 

 meter 19'. 6'-5. B. W. 72°-4. 



Barometer in Popayan 22' lli-20. B. W. 75°-65 

 on Sombreros 19 6 -05. B. W. 72 -^O 



Differences 3 5 "15. 3 -25 



lo vs°'2ii 

 411-15 : 3^-25 : : ^^^^^~~- = 0-947 for 12 lines barometer. 

 41-15 



I ascended the hill of Tambores : barometerlS' ll''6. B. 



W. 71°-75. 



Barometer in Popayan 22' lli-2. B. W. 75°-65 



on Tambores IS 11 -6. B. W. 7l -75 



Differences 3 11-6 3 -90 



12 X 3'9 

 471-6 : 3°-9 : : 12 — — — — = 0-983 for 12' barometer. 



47*D 



9° 

 Proof that above —- of Reaumur is the true exponent of 



one inch of the barometer. 



