Apparent time. 



h m 



3 27 R 



5 28 



5 55 



6 12 



5 30 R 



5 57 



6 10 



352 Sir David Brewster orc the Polarization 



1842, March 18.— Barom. 29-09 in. Wind and rain, day 

 cold, and wind in west. 



e. 



R=25°, diminishing to 2(P. Arag0 \ 



15 48 

 18 10 

 17 48 



Babinet. 



R=30° in zenith plane .. 19 10 



17 40 

 20 12 



1842, March 19.— Barom. 29 in. 



3 54 Polarization of moon, 20±°; R= 23° in zenith. 



Arago. 



4 39 R=24° in zenith plane ; sky very clear. 10 37 



5 44 .. .. .. .. 19 45 



6 4 Polarization of moon, 20^°; R = 22f in zen. 18 47 

 6 19 . . . . . . . . 18 45 



Babinet. 



5 48 R=26|° in zenith plane. . . 19 30 



6 12 .. .... .. 19 45 



6 21 17 26 



1842, March 24.— Cleared up at l h . Fine day. 



2 R=22|°, 50° above the horizon. 

 4 R=20i° in zenith plane. 



1842, March 26.— Barom. 29'3 in. Cold wind from point 



north of west. 









5 49 



6 16 



6 31 





•• 



Arago. 



18 32 



19 25 

 18 4 



5 52 R=28^° in zenith plane 



6 34 





•• 



Babinet. 



19 20 

 19 40 



1842, March 28.— Sky clear. 









4 20 R= 26£° in zenith plane, 



and 18 c 



5 and 20 



D in horizon. 



1842, March 29. 



6 20 



6 36 





•• 



Arago. 



17 55 

 17 50 



6 18 



1842, March 30.— Wind; flying clouds. 



6 27 R=28|° in zenith, to 23|°in horizon. 

 6 45 

 6 52 

 6 24 



6 48 



3 10 R=21£° in zenith plane 



Arago. 



18 13 

 17 55 



19 37 



Babinet. 



20 40 

 19 54 



