1867.] Observations among the Alps, 325 



Summit of Mont Blanc, July 14, 1866, Actinometer (K). 



A. 

 Appa- 

 renttime 

 of com- 

 mencing 

 eachobs. 



B. 



Sun 



o, 



shade 

 X . 



c. 



Initial 

 reading. 



D. 



Ter- 

 reading. 



E. 

 Change 

 + . ' 



F. 



Change 

 in shade 



G. 



Solar 

 effect 

 unre- 

 duced. 



H. 



Tempe- 

 r3.tiirG Q'. 

 liquid. 



1 ^' 



Solar 

 'effect re- 

 duced to 

 32° F. 



Actino- 

 meter 

 (K) re- 

 duced' 

 to (A)'. 



L, 



Ave- 

 rages. 



h m 























8 2^ 



X 



1732 



1192 





540 















8 30 







1172 



1300 



128 





716 



51 



708 



913 





8 3U 



X 



1238 



602 





636 













8 33^ 







600 



714 



114 





738 



50 



730 



942 





8 34^ 



X 



662 



50 





612 













9 Qh 



V 



2098 



1792 





306 













9 s'' 







1890 



2272 



382 





718 



50 



711 



917 





9 9* 



X 



2200 



1834 





366 













9 iT 







1840 



2234 



394 





772 



50 



764 



986 



955 



9 12* 



X 



2200 



1810 





390 













9 14^ 







1882 



2270 



388 





753 



50 



745 



961 





9 15i 



X 



2120 



1780 





340 













9 19* 



X 



1460 



1198 





262 













9 2\ 







1300 



1800 



500 





788 



48 



781 



1007 





9 22| 



X 



1852 



1538 





314 













9 24 







1582 



2032 



450 





775 



48 



768 



991 



995 





X 



2026 



1690 





326 













9 27 







1754 



2178 



424 





772 



49 



764 



985 



994 



9 29. i 



X 



1760 



1400 





360 













9 sr 







1472 



1898 



426 





789 



49 



781 



1007 



993 



9 32* 



X 



1906 



1540 





366 













9 33^ 







1568 



1974 



406 





765 



49 



757 



977 



996 



9 35* 



^ 



1972 



1620 





352 













9 36^ 







1692 



2150 



458 





787 



49 



779 



1003 



998 



9 38* 



X 



2146 



1840 





306 













9 39^ 







1880 



2358 



478 





789 



49 



781 



1007 



1002 



9 41* 



X 



2290 



1974 





316 













9 43" 







2068 



2514 



446 





781 



50 



773 



996 





9 44J 



X 



2454 



2100 





354 













9 51* 



X 



1908 



1580 





328 













9 53^ 







1558 



1980 



422 





760 



50 



752 



970 





9 54* 



X 



18U4 



1546 





348 













9 56 







1608 



2042 



434 





788 



50 



780 



1006 



992 



9 57* 



X 



2022 



1662 





350 













9 59 







1680 



2094 



414 





783 



50 



775 



1000 



988 



10 0^ 



X 



2062 



1684 





378 













10 2' 







1788 



2164 



376 





758 



51 



750 



967 



993 



10 3|^ 



X 



2126 



1740 





386 













10 5 







1S20 



2220 



400 





783 



51 



774 



999 



994 



10 6* 



X 



2190 



1810 





380 













10 8" 







1904 



2290 



386 





776 



51 



768 



991 1 1001 



10 9* 



X 



2426 



2026 





400 













10 \\ 







2060 



2440 



380 





795 



52 



786' 



1014 





10 12t 



X 



2380 



1950 





430 













10 19* 





1270 



992 





278 













10 n 





1086 



1580 



494 





792 



52 



783 



1010 





10 22i 





1600 



1282 





318 













10 24 





1386 



1828 



442 





778 



52 



769 



992 





10 25* 





1764 



1410 





354 













The recorded numbers denote tenths of the scale which is divided to 

 millimetres, the last figure being assigned by estimation. 



