310 Royal Society : — Rev. G. C. Hodgkin son's Actinometrical 

 Chamonix, July 14, 1866, Actinometer (A). 



A. 



B, 1 



c. 



D. 



E. 



F. 



G. 



H. 



1. 



L. 



Appa- 





















rent time 



Sun 











Solar 





Solar 





of com- 



O. 



Initial 



Ter- 



Change 



Change 



effect 



Tempe- 



effect 



Ave- 



mencing 



shade 



reading. 



6 



minal 



in sun, 



n shade, 



unre- 



rature of 



reduced 



rages. 



each ob- 



x . 





•eading. 



+ • 



— • 



duced. 



liquid. 



to 32° F. 





serva- 





















tion, 





















h m 





















8 22J 



X 



1230 



780 





450 





o 







8 24 







1160 



1580 



400 





837 



85 



811 





8 25i 



X 



1514 



1090 





424 











8 27 







1140 



1554 



414 





818 



85 



793 



812 



8 28i 



X 



1484 



1100 





384 











8 30 







1180 



1640 



460 





857 



85 



831 



799 



8 31i 



X 



1504 



1094 





410 











8 33 







1204 



1614 



410 





830 



85 



804 



794 



8 341 



X 



1330 



900 





430 











8 36 







950 



1304 



354 





779 



84 



755 



805 



8 37* 



X 



1214 



794 





420 











8 39" 







890 



1280 



390 





814 



84 



789 



803 



8 40i 



X 



1230 



802 





428 











8 42" 







842 



1310 



468 





872 



84 



846 



800 



8 43£ 



X 



1182 



802 





380 











8 45 







812 



1280 



468 





848 



84 



822 



803 



8 46i 



X 



1202 



822 





380 











8 48 







940 



1380 



440 





814 



84 



789 



802 



8 491 



X 



1280 



912 





368 











8 51 







1040 



1460 



420 





795 



85 



770 



791 



8 52i 



X 



1312 



930 





382 











8 54 







1032 



1462 



430 





806 



85 



781 



797 



8 551 



X 



1350 



980 





370 











8 57 







1092 



1542 



450 





820 



85 



795 



795 



8 58i 



X 



1452 



1080 





370 











9 







1182 



1660 



478 





878 



85 



851 



807 



9 I* 



X 



1744 



1330 





414 











9 3 







1394 



1780 



386 





801 



86 



776 





9 41 



X 



1620 



1204 





416 











9 6* 



X 



1204 



800 





404 











9 8 







890 



1324 



434 





841 



84 



816 





9 9i 



X 



1230 



820 





410 











9 11 







950 



1394 



444 





844 



85 



818 



821 



9 121 



X 



1264 



874 





390 











9 14 







1014 



1480 



466 





856 



85 



830 



807 



9 15i 



X 



1420 



1030 





390 











9 17 







1124 



1554 



430 





808 



85 



783 



800 



9 181 



X 



1420 



1054 





366 











9 20 







1220 



1670 



450 





813 



85 



788 





9 2U 



X 



1560 



1180 





360 











9 23~ 







1310 



1790 



480 













9 27f 



X 



1554 



1294 





260 











9 29 







1414 



1914 



500 





820 



86 



794 





9 30i 



X 



1774 



1394 





380 











9 32 







1560 



2000 



440 





820 



86 



794 



798 



9 33| 



X 



1870 



1490 





380 











9 35 







1614 



2100 



486 





831 



86 



805 



811 



9 36i 



X 



2024 



1710 





310 











9 38 







1664 



2210 



546 





876 



S6 



849 



809 



