of the Atmosphere. 357 



1842, August 11. — Barom. 29*62 in.; rain in morning. 



Apparent time. 



5 30 R=23i° in zen. plane, and20i°inS.hor. Arag0 

 5 51 + Bands opposite sun almost gone at If ] 



6 14 



6 46 



7 40 



8 4 



above horizon. 



Altitude of the two neutral points above 



6 40 

 14 35 

 20 35 

 22 20 



Babinet. 



18 25 

 12 



the horizon 



7 43 | 



8 10 J R = 29° in zenith 

 1842, August 17.— See Phil. Mag. vol. xxx. p. 169. 

 1842, August 22. — Warm ; fine day. 



2 20 R=24i° maximum polarization in zenith plane, to 1°4° in* 



horizon. Arago. 



18 36 



5 52 



21 16 

 19 56 



22 8 



Babinet. 



13 8 



6 37 R= 27F in zenith plane 



7 26 R=28i° in zenith plane 

 7 49 



7 52 



1842, August 28.— See Phil. Mag. vol. xxx. p. 169. 

 1842, September 9. — Barom. 29*1 in., after rain. 



5 53 R=26£° maximum polarization in zenith, to 25£° in hor. 



Arago. 



6 38 . . . . . . . . 18 57 



1842, September 13.— Barom. 29*93 in. Fine day. 



4 39 R=28° maximum polarization in zenith plane. 



{R=27l°maximum polarization in30°alt. ] 

 N.W. horizon, to 24|° in horizon. InV 15 35 

 S. hor. alt. 30°, 26k°, to 22^° in hor. | 



5 29 18 35 



5 58 U=29i° max.' pol. Pol. of moon 19£°. 20 17 



6 36 . . . . . . . . 20 



7 2 .. .. .. .. 16 24 



Babinet. 



5 31 R=29° maximum polarization in zenith. 14 25 



5 56 . . . . . . . . 15 40 



6 38 R= 29^° maximum polarization in zenith. 16 6 



7 6 19 8 



1842, September 17. — Barom. 29'45 in., after a rainy day. 



Arago. 



6 48 p.m. .. .. .. 17 20 



Babinet. 



6 53 „ R=28£° max. polarization in zenith. 16 25 

 1842, September 18.— Fine blue sky. Barom. 29*57 in. 

 3 R=2H° in zenith plane, to 19£° in horizon. 



3 45 R=22i° in zenith plane, to 20£° in horizon. 



4 20 R=25° in zenith plane, to 23° in horizon. 

 4 46 Fringes all + opposite sun and in horizon. 



4 47 Arago. 



5 6 . . . . . . . . 15 28 



5 36 .. .. .. .. 16 36 



5 56 .. .. .. .. 20 16 



5 21 R = 27i°max.pol.inzenith,to24i°inhor.l9 40 



