ON SOLAR RADIATION. 



141 



Old Trafford, Manchester. — Solar Radiation, 



Year. 



January, 



February. 



March. 





Max. 







Max. 







Max. 









bk. bulb 



Max. in 



Diff. 



bk. bulb 



Max. in 



Diff. 



bk. bulb 



Max. in 



Diff. 





in sun. 



shade. 





in sun. 



shade. 





in sun. 



shade. 











c 































1856 



45 "4 



43'9 



1*5 



49-1 



46-9 



2-2 



54-6 



48-2 



6-4 



1857 



43-1 



417 



1*4 



49*9 



46-4 



3*5 



54'4 



477 



67 



1858 



49-8 



44-8 



5-0 



47*9 



44-1 



3-« 



56-3 



507 



5-6 



1859 



51-1 



46*0 



51 



536 



47 '4 



6-2 



57-6 



50-8 



6-8 



i860 



46-4 



42-9 



3-5 



47-1 



41-9 



5'2 



54*3 



46-4 



7*9 



1861 



41-3 



40-4 



0-9 



52*2 



46-8 



5-4 



60-4 



49-6 



10-8 



1862 



44-6 



43-2 



I '4 



497 



46-3 



3 "4 



56-8 



47'9 



8-9 



1863 









55-2 



49-6 



5-6 



628 



51-6 



11*2 



1864 



43*4 



41-7 



17 



45-5 



41*6 



3-9 



59-8 



47-9 



II-9 



1865 



43-6 



41-3 



2-3 



46-8 



42-3 



4-5 



57-0 



44-1 



12-9 



1866 



49-0 



47'3 



17 



52-9 



46-4 



6-5 



5«7 



47-6 



ii'i 



Means 



4577 



43-32 



2-45 



49-90 



45"43 



4*47 



57-52 



48-41 



9-II 







April. 



May. 



June. 



1856 



66-3 



55*9 



10-4 



70-6 



597 



10-9 



76-4 



64' 3 



101 



1857 



656 



53-8 



11-8 



75-2 



62*2 



13-0 



82-6 



73*6 



8-0 



1858 



66-5 



57*9 



8-6 



72*6 



59-5 



13-1 



82-7 



73-8 



8-9 



1859 



61-9 



53'9 



8-0 



79'4 



657 



13-7 



«3-5 



68-8 



14-7 



i860 



63'o 



54'4 



8-6 



817 



65-4 



16-3 



«i'3 



63-9 



17-4 



1861 



72-6 



55-5 



17-1 



73-2 



59 "4 



138 



86-2 



68-6 



17-6 



1862 



70-8 



56-0 



14-8 



81-2 



62-7 



18-5 



... 



... 





1863 



69-9 



56-2 



137 



74-8 



59'5 



15-3 



81-4 



65-0 



16-4 



1864 



76-0 



59-0 



17-0 



81-4 



66-5 



14-9 



8i-2 



66-2 



15-0 



1865 



81-5 



63*5 



i8-o 



79'3 



650 



14-3 



93'o 



72-8 



20-2 



1866 



74" I 



57'3 



168 



82-1 



62-2 



199 



88-0 



71-8 



162 



Means 



69-84 



56-67 



1317 



77'37 



6253 



14-84 



83-63 



68-88 



1475 







July. 



August. 



September. 



1856 



807 



68-0 



1 



12*7 





• •• 



... 



74" 3 



63*9 



10-4 



1857 



83-6 



69-6 



14*0 



«^-5 



72-0 



io'5 



75-8 



67-4 



8-4 



1858 



79*6 



66-8 



12-8 









797 



66-3 



13-4 



1859 



867 



74-2 



i2'5 



... 







76-2 



637 



12-5 



i860 



83-8 



66-8 



i7"o 



... 





... 



71-8 



59'5 



12-3 



1861 



85-8 



67-1 



187 









78-5 



63-9 



14-6 



1862 



80-3 



64-8 



15*5 









74-2 



62-6 



11-6 



1863 



«7-3 



689 



18-4 



83-4 



66-0 



17-4 



70-1 



S8-S 



11-6 



1864 



86-0 



70-9 



151 



80-9 



68-0 



12-9 



73*3 



65-2 



8-1 



1865 



94-4 



76-6 



17-8 



817 



687 



13-0 



82-3 



73'4 



8-9 



1866 



84-2 



70-3 



'3*9 



77-8 



67*0 



IO-8 



70-0 



62-4 



7-6 



Means 



84-76 



69-45 



15-31 



81-26 



68-34 



12-92 



75'" 



64-16 



10-85 



