460 Sir David Brewster on the Polarization 



1843, July 24. — Barom. 29*87 in., rising; no rain. 



Apparent time. Arago. 



h m # , 



6 58 .. .. .. .. 17 52 



1843, August 6. — Barom. 29*77 in., after a wet day. 



7 27 R=29£° max. pol. in zenith: sky clear 18 49 



Babinet. 



7 49 .. .. .. .. 17 39 



1843, August 9. — Fine day; rain yesterday. 



Arago. 



7 37 19 34 



8 3 18 17 



1843, August 10. — Splendid day; haze in zenith; slight 

 white clouds. Barom. 29*97 in. ; hot. 



11 38 R=24° maximum polarization in zenith plane. 

 1843, August 19. — Barom. 29*6 in., falling; haze all forenoon. 



7 7 



7 51 



•• 



•• 



18 53 

 18 30 



7 23 R=27|° 



maximum 



polarization 



Babinet. 



17 50 



1843, September 6.- 



— Barom 



. 30-05 in. 



; splendid, ho 



7 11 





.. 



Arago. 



23 10 



7 18 



, , 



. , 



Babinet. 



16 32 



1843, September 9.- 



— Barom. 



, 30-05 in. 



; fine day. 



6 55 .. 







Arago. 



19 25 



7 







Babinet. 



17 23 



1843, September 13.— Barom. 29*98 in. ; fine day. 



Arago. 



r g I Neutral point in horizon ; R=25°maxi-| in 55 



j mum polarization in S. horizon. j 



6 48 



Babinet. 



6 53 R=30° max. pol. in zenith, 23£° in S. hor. 16 26 

 1843, September 20. — Barom. 29'80 in. ; no rain.- 



Arago. 



6 H I Clouds W., clear E.; R=23i° zenith,) ^ 42 

 [ 24a° in horizon . . . . j 



1843, September 21. — Barom. 30 in., rising. 



5 46^ ') 18 59 



6 3 



3 ■ 



o R= 30° maximum polarization in ze- I 17 55 



S, ni-f-l-i 9AA° in Vinriismn ♦ Tint n nlnilfl > 



6 ^8 



""* y nith, 25^° in horizon; not a cloud 



. ./ , Babinet. 



5 51 I mthesk y •• •• ] 18 54 



6; 31J J 18 43 



