1882.] H. F. Blanford — Some further results of the sun-thermometer. 79 



The chief point in which the inverse variation of insolation and 

 humidity, otherwise distinctly indicated, seems to fail is, that the minimum 

 of the former, at both stations, occurs in April or May, while the maxi- 

 mum of the latter as tested by relative humidity and cloud proportion 

 falls in October ; but, as regards the absolute humidity of the lower atmos- 

 phere, the coincidence holds good. And it will presently be seen that there 

 is good reason why, other things being equal, the atmosphere should be 

 somewhat more diathermanous after than before the beginning of the rains. 



When, however, we turn from the coast stations to those in the interior 

 of the country, where moreover, the range of insolation temperature is 

 in some cases greater, this concomitance of absolute humidity and atmos- 

 pheric absori)tion, which holds good at maritime stations, fails more or 

 less completely ; and it is evident that the latter is mainly determined by 

 some cond ition of a very different nature. 



Table IV. — B. Interior. 



Tnsol, 

 Vap.Ten 

 Rel.Hum 

 Cloud 



Jan. 



Feb. 



55-3 55-8 

 •416t -470 

 60 55t 

 1-50 11-76 



W 



Tnsol. I 56 6 

 Vap.Ten. -2571 

 Rel.Hum.! 51 

 Cloud ! 2 36 



56'2t 

 •267 

 44 

 211 



Mar. 



54-7 

 •631 

 55 f 



2 74 



56 2t 



•288 



36 



2 58 



Apr 



May. 



537t 

 •797 

 62 

 3-36 



54-8 



•890* 



72 



4^73* 



June 



57-1 57-1 



•325 -523 



32+1 44 



2 62 325 



08 flnsol. 

 -S J Vap.Ten. 

 I I Rel Hum. 

 jg t-Cloud 



57-1 



56-3 



54-7t 



561 



560 



... 



... 



... 





601 



60-4* 



•445t 



•484 



•510 



•570 



•627 



... 



... 







•727* 



•564 



60 



54 



45 



41t 



43 



... 



... 





... 



72* 



67 



l-26t 



1-54 



160 



175 



261 



... 



... 



... 



... 



3-46* 



264 



July. 



Aug. 



Sep. 



Nov. 



Dec. 



57 



56^7 



598 



•495 



68 



63 



210 



132 



If 



Insol. 



60-1 



60-7* 



49-2 



576 



566 



55-5t 









58-0 



594 



Vap.Ten. 



336t -359 



•404 



•449 



586 



•765* 



... 





... 



•645 



414 



= 1 



Rel.Hum. 



67 



60 



46 



36t 



42 



52 









68* 



63 



Cloud 



1-93 



2-22 



189 



143t 



161 



4-39* 





... 



... 



1-48 



093 



Insol. 



60-9 



62-4 



63-3* 



62-7 



60^9 



57-6t 



59-4 





603 



593 



59 9 



Vap.Ten. 



•221t 



•254 



•312 



357 



•455 



•597 



787* 





•660 



•375 



•219 



Rel.Hum. 



52 



50 



42 



36 



35t 



40 



58 





53 



38 



39 



Cloud 



2-76 



4^33* 



4-17 



370 



293 



324 



520 





2^87 



103t 



1^46 



Oct. 



59-3^ 



•857 



78* 



466 



58 3*|56 6:56-2t 



552* 346 |-266 



QQ*\ 53 1 52 



4^11*|203 1 92t 



57'5 



•462 



64 



155 



60^3 

 •345 

 68* 

 163 



596 

 •233 

 62* 

 253 



i f 



Insol. 



58 622 



62 6* 



60-8 



56-2 



51-6 



50-4t 



53 6 54-9 



56-2 



55-1 



54^9 



>^ 



Vap.Ten. 



•209t -227 



•333 



•407 



•450 



•527 



667 



•746* -573 



•367 



•258 



•230 



-s 



Rel.Hum. 



59 57 



57 



54 



43 



40t 



49 



59 53 



47 



55 



fi-^,* 



pijl. 



Cloud 



373 433 



4^50* 



4^12 



2^84 



215 



216 



2 98 1 57 



l-44t 



2 08 3-43 



