4®© Mr. South on the discordances between the 
Table VII -continued. 
1822. 
Exposure of the Instrument, March t . 
Times of Comparison. Thermometers under the cover Thermometers under the cover 
j, t of the Black, or Western Axis, of the White, or Eastern Axis. 
21 33 ........ ... 41°.0 .... ......... 4I°.0 
22 IO ............... 58 .O ................. 44 .O 
22 27 68 .5 44 .5 
22 40 ............... 68 .0 44 -5 
22 49 68 .5 45 .5 
Mean ~ 65 .8 Mean = 44 .6 
Hence, difference of temperature = zi°.z. 
Not a cloud was visible, from the time at which the shutter was opened, until the 
experiments were concluded. 
Exposure of the Instrument, May 21. 
Times of Comparison. Thermometers under the cover Thermometers under the cover 
] 1> ln of the Black, or Western Brace. of the White, or Eastern Brace. 
2 47 ....... 66°. 3 66°. 3 
3 22 89.0 72.0 
3 45 9 1 -° 74 *° 
3 53 «... 94*o 74-° 
Mean = 91 .3 Mean — 73 .3 
Hence, difference of temperature = i8°.o. 
Thermometers under the covers of the western and eastern axes, gave results 
similar to these. Sky cloudless. 
Exposure of the Instrument, May 31. 
Times of Comparison. 
h. m. 
3 20 ..... 
Thermometers under the cover 
of the Black, or Western Axis. 
......... 6o°.o ...... 
Thermometers under the cover 
of the White, or Eastern Axis, 
6o°.o 
7 C C ........ 
J JJ • • a * * 0 * 
4 10 
^ 20 ......... 
4 33 
62 .0 
63 .0 
63 .0 
64 .O 
Mean == 85 .0 Mean ~ 63 .0 
Hence, difference of temperature — zz°.o. 
A cloudless sky, during the observations. Thermometers under the covers of the 
braces, gave results coincident with the above. 
