of the Atmosphere. 45 7 



1843, March 29.— Barom. 29*88 in. Fine day, cold; wind 

 east; dry. 



Apparent time. Arago. 



3 51 R=28i°, 25^° in S. and 26£° in W. hor. 



5 58 . . . . . . . . 18 35 



6 26 .. .. .. .. 19 33 



Babinet. 



6 1 R=29i° max. pol. in zenith. 28* in hor. 18 22 

 6 24 R=29|° „ „ „ 18 27 



1843, April 7. 



Arago. 



6 54 .. .. .. .. 19 



Babinet. 



6 48 .. .. .. .. 16 29 



1843, April 10. — Barom. 29*74 in. Very cold wind, north- 

 west. 



Arago. 



6 23 . . . . . . . . 20 42 



Babinet. 



6 25 . . . . . . . . 22 23 



1843, April 11.— Barom. 29*80 in. Very cold. 



Arago. 



6 43 R=28|°max.pol. Sky whitish blue. 17 30 

 6 48 17 45 



1843, April 12.— Barom. 29*77 in. 



Babinet. 



4 35 4135! 



The sky was covered with a thick haze, the sun barely seen 

 through it, and showers of hail falling occasionally. The bands 

 a maximum above the sun, but disappeared 9° above horizon. 

 A neutral point was seen at 25° alt. opposite the sun, but the 

 bands below it seemed + ! though extremely faint. 



1843, April 17.— See Phil. Mag. vol.fxxx. p. 165. 



o Arago. 



6 30 R=25£ max. pol. in zenith, 20£° in hor. 22 32 



7 4 11=29 „ „ „ 20 44 

 7 30 R=29£ „ „ „ 20 10 



1843, April 19. — Nebulosity in zenith. Clouds round horizon. 



Arago. 



7 30 R=25i°max. pol. in zenith plane. 18 35 



Babinet. 



7 33 .. .. .. .. 19 



1843, April 28. — Barom. 29*44 in., after rain. Clear sky 

 after clouds had cleared away. 



* Arago. 



7 9.. .. .. ., 20 23 



7 40 . . . . . . . . 19 37 



Babinet. 



7 3 R= 29° max. pol. in zenith plane. 16 46 



7 44 R=29°max. pol. in zenith, 20£° in hor. 18 



