376 



Observations made on a Botanical Excursion, 



[Oct. 



tion the amount of the latter is small. The maximum depression of a 

 Thermometer laid on grass never exceeding 10°, and averaging 7° ; the 

 average depression of the dew point at the same hour amounting to 

 25° in the morning ; of course no dew is deposited, even in the clearest 

 star-light night, which I attribute in part to the extreme desiccation, 

 and in part to the operation of the light haze alluded to above. 



Table-land of Birbhoom and Behar. 





Temperature. 



Wet Bulb. 



O 



Dew Point. 



u 







S=- . 

 > % 



Saturation. 



in 



.a . 















fil S3 







S3 



S3 









tZ S3 





S 



ij 



S3 



60 



s 



c 



a 









§2 





i 



i 



S3 



. 



.2 



S3 £ 



jg2 





 J-.'- 25 



■5,3 



•53 S3 





03 



S3 



a 



3 





S 



§ 



§ 



tf 



% 



P 



Q 



W 



§ 



a 



£ 



P 



P 



£ 



§ 



s 



s 



£ 



Sun-rise • • 



56.6 



65.2 



46-3 18.9 48.2 



12.5 



6.0 



.276 



39.5 



52.0 23.3 



31.7 



10.4 



3.088 



.550 



.680 



.330 



7 



9 A. M. •• 



70.1 



77-0 



61.2 15.8 53.7 



19.3 



14.3 



.264 



37.9 



52.7, 24.5' 39.2 



24.3 



2.875 



.330 



.450 



.260 



7 



3 P.M.-.- 



75.5 



81.7 



65.2 16.5 55.3 22.5 



16.7 



.248J 36.0 



46.8,24.3 48.4 



34.9 



2.674 



.260 



.320 



.190 



7 



9.P.M 



61.7 



66.2 



55.51 10.7 40.3 20.5 



' 9.0 



.248' 36.1 



50.o'*9.l'56.9 



16.2 



2.745 



.410 



.590 



.140 



10 



Extreme variations of Temperature 



„ ,, ,, Saturation 



,, diff. between Solar and Nocturnal Radiation- 



* Taken during a violent N. W. dust storm. 



35.4 

 54.0 

 96.5 



Table-land of Behar and Beerbhoom. 



Solar Radiation. 



Morning. 



Afternoon. 



Time. 



Th. 



Black 

 Bulb. 



Diff. 



Phot. 



Tim. 



H 



3 



3 



3 1 

 3 



Th. 



Bla 

 Bulb. 



109 

 120 

 127 

 105 

 110 



114.2 



Diff. 



Phot. 



9| A. M. 

 10 



77.0 

 69.5 

 77.0 

 63.5 

 61.2 

 67.0 

 69.2 



130 

 124 

 137 

 94 

 106 

 114 

 117.8 



53.0 

 54.5 

 60 

 30.5 

 44.8 

 49.0 

 48.6 



10.320 



10.230 



10.350 

 10.300 



81.7 

 80.5 

 81.5 

 72.7 

 72.5 



7 7.7 



27.3 

 39.5 

 45.5 

 32.3 

 37.5 



36.4 



10.320 



10 



10.330 



9 



10.230 



9 



10.390 



9 





Mean 



10.318 



