of the Atmosphere. 461 



1843, September 22. — Barom. 30*28 in., rising; thick in ho- 

 rizon, with a brownish-red light. 



k Apparent time. Arago. 



h m 



6 1 . . . . . . . . 18 22 



6 7 R=29^° max. pol. in zenith, 22|°in hor. 19 58 



1843, October 31. — Barom. 29*39 in.; fine sunny day. 



4 9 .. .. .. .. 15 40 



4 22 .. .. .. .. 17 56 



4 59 . . . . . . . . 20 49 



Babinet. 



4 24 R = 29f°max. pol. in zenith, 25|°inhor. 17 8 

 4 45 Polarization of moon 24|°. 



1843, November 7. — Barom. 29*30 in., rising; fine day. 



Arago. 



4 29 R=29|° max. pol. in zen., 26^° in S. hor. 18 22 



1843, November 14. — Barom. 30*13 in., rising; fine day; wind 

 north-west by west. 



4 12 .. .. .. .. 18 33 



Babinet. 



4 17 R=28°max. pol. in zenith plane .. 18 45 



1843, November 20. — Barom. 29*27 in., rising; cold day. 



Arago. 



4 36 . . . . . . . . 21 32 



Babinet. 



4 37 18 13 



1843, November 29.— Fine day. 



* J Arago. 



3 31 14 14 



1843, December 1. — Barom. 29*94 in. Pine day. 



4 10 .. 18 8 



Babinet. 



4 12 19 26 



1843, December 6. — Fine day; wind west; clear sky every- 

 where. Arago. 



3 3 .. .. .. .. I 6 5 8 



Babinet. 



3 7 R=28|°, 90° from sun . . 18 11 



1844, January 23. — Barom. 27*8 in., rising; fine day. 



Arago. 



3 34 . . . . . . . . 18 51 



Babinet. 



3 37 It =27° max. pol. in zenith plane. 17 31 

 1844, January 25.— Barom. 29*84 in. ; rain till 2 h p.m. 



Araaro. 



4 20 . . . . . . . . 18 16 



4 26 R=28° maximum polarization in zenith. 



Babinet. 



4 38 Polarization of moon 171°. .. 19 



