192 



Mr. J. B. N. Hennessey. 



[Dec. 16,. 



Table IX. — Simultaneous experimental Observations at Dehra, the 

 two Actinometers A and B being set side by side, and read by 

 means of the same Chronometer. 



1880. February 27. 



Observed results 

 reduced to 32° F. 



Radiation 



by 





1 





Values ex- 

 ceeding 10. 



Apparent Time. 









































dA — 

 dB. 











A 



B. 







I cfA. 



dB. 



















A. 



B. 









dA. 



dB. 





















-Beginning. 



JliIlU. 





X 







X 

















h. m. s. 



h. m. s. 





























11 39 



11 40 



425 





405 



















40 30 



41 30 





416 





439 



832 



846 



+ 17 



+ 6 



+ 11 



+ 17 



+ 6 



42 



43 



407 





408 



















43 30 



44 30 





413 





445 



817 



853 



+ 2 



+ 13 



— 11 



+ 2 



+ 13 



45 



46 



400 





407 



















46 30 



47 30 





437 





473 



833 



8/0 



+ 18 



+ 30 



— 12 



+ lo 



i OA 



+ oU 



48 



49 



391 





386 



















49 30 



50 30 





433 





455 



832 



851 



+ 17 



+ 11 



+ 6 



, 1(7 



+ 17 



i i i 

 + 11 



51 



52 



407 





405 



















52 30 



53 30 





430 





437 



829 



842 



+ 14 



+ 2 



+ 12 



i 1 A 



+ 14 



+ 2 



54 



55 



390 





404 



















55 30 



56 30 





398 





4L0 



798 



833 



— 17 



— 7 



— 10 



— 17 



— 7 



57 



58 



409 





441 



















58 30 



59 30 





409 





404 



818 



839 



+ 3 



_ l 



+ 4 







12 



12 1 



408 





429 



















1 30 



2 30 





404 





415 



805 



834 



— 10 



- 6 



— 4 



— 10 



— D 



3 



4 



393 





409 



















4 30 



5 30 





415 





425 



825 



846 



+ 10 



+ 6 



+ 4 



i 1 A 



+ 10 



+ 6 



D V 



ft n 

 f u 



427 





433 



















7 30 



8 30 





388 





412 



813 



841 



— 2 



+ 1 



— 3 







9 



10 



A QO 





424 



















10 30 



11 30 





404 





410 



812 



835 



- 3 



- 5 



+ 2 







12 



13 



393 





425 



















13 30 



14 30 





415 





400 



809 



830 



- 6 



-10 



+ 4 



- 6 



-10 



15 



16 



395 





435 



















16 30 



17 30 





416 





412 



806 



838 



- 9 



- 2 



- 7 







; 18 



19 



384 





417 



















I 19 30 



20 30 





404 





407 



796 



824 



-19 



-16 



- 3 



-19 



-16 



| 21 



22 



399 





417 



















22 30 



23 30 





433 





434 



816 



843 



+ 1 



+ 3 



— 2 







24 



25 



367 





400 



















25 30 



26 30 





422 





408 



809 



824 



- 6 



-16 



+ 10 



- 6 



-16 



27 



28 



407 





432 



















28 30 



29 30 





389 





396 



800 



825 



-15 



-15 







-15 



-15 



30 



31 



414 





425 



























Mean. . 



815 



840 





Sum. . 



151 



138 



