456 
Mr. South on the discordances between the 
Table VII. 
To show the nature and extent of the exposure, to which the 
Instrument was subjected. 
1821. 
Exposure of the Instrument, August 22. 
The Sun’s rays were allowed to fall upon the Instrument, 
eighteen minutes before his centre came to the meridian ; not 
a cloud intervened, during the interval of exposure ; no ther- 
mometers were appealed to. 
Exposure of the Instrument, August 2 3 . 
Times of Comparison, 
h. m. 
9 46 .... . 
Thermometers on the 
Western Axis. 
Thermometers on the 
Eastern Axis. 
9 5+ 
9 57 ■*••• 
10 0 .... . 
10 5 .... . 
10 10 
8 3 -9 
.88 .0 . 
Mean rr 85 .6 Mean =71.1 
Hence, difference of temperature 
= I 4 °* 5 * 
Exposure of the Instrument, August 24. 
Times of Comparison, 
Thermometers on the 
Thermometers on the 
h. m. 
Western Axis. 
Eastern Axis. 
9 8 
9 18 .79 .2 71 .8 
9 24 83 .0 71 .8 
9 2 9 84 .5 71 .9 
9 33 8 S 7 1 -9 
9 3 8 8 5 .9....... ....71 .9 
Mean = 83 .5 Mean = 71 .9 
Hence, difference of temperature = n°.6. 
