262 SIR DAVID BREWSTER ON THE 



1842, January 28. — Barom. 29 6. Fine day; fresh. 



Arago. 

 13° 5' 



>2 i 21 15 



20 25 

 19 41 

 Babinet. 

 18° 48' 

 18 10 

 16 52 



1842, January 29.— See " Edinburgh Transactions," vol. xxiii. pp. 216, 224. 

 1842, February 2.— Very fine day, and clear sky till 2 h . 



Apparent Time. 

 ll h 30 m a m. Arago's neutral point not risen. 



R=25° in zenith plane, 20J° in horizon. 



Arago. 

 2 p.m. A thick, impure sky. 16° 50' 



Apparent Time. 



2 h 7 m p.m. 



R = 22J° in zenith ; 



25^° in E. horizon. 



3 23 





R=26J° in zenith; 



27£° in S.E.. and 



1 



in S.W. horizon. 





3 43 









4 5 









3 21 









3 47 









4 2 









1842, February 3.— Fine day. 



Apparent Time. Arago. 



4 h 43 m 20° 20' 



Babinet. 

 4 45 22° 1' 



1842, February 4. — Barom. 3015. Fine day; cloudy. 



Apparent Time. Arago. 



3 h 14^ R=20i° in zenith, 24|°, 50° alt. W. horizon. 18° 40' 



n j R = 25° in zenith, thin whitish clouds, 24^° in "1 „„ „_ 



\ E. horizon, 10° alt., 22£ 3 in alt, 20 c W.horizon.j U 6 ' 



4 44 20 14 



1842, February 5. — Barom. 30-05. Fine day ; sky perfectly clear. 



Appar 



ent Time. 



l h 



51 m 



1 



44 



3 



48 



4 



9 



4 



31 



3 



51 



4 



7 



4 



33 



9 



5 A.M. 



12 



34 p.m. 



R = 28i° in zenith, 26-|-° to 18£° on E. horizon, 

 neutral line convex to sun. 



R = 27^° in zenith. 



R = 22£° 30° alt. S.W. horizon. 



R = 27i° in zenith, 20 J° in horizon. Dark haze 



in horizon from E. to W. hy N. 

 R = 272° in zenith to 14£° in horizon. 



An 



igo. 



17° 



25' 



23 



10 



22 



15 



20 



50 



20 



30 



Babinet. 



17° 



20' 



19 



42 



20 



38 



1842, February 10. — Fine day, but cloudy. 



Apparent Time. 



Arago. 



2 h 57 m 



R=24i°, 25° above W. horizon. 16° 45' 



3 58 



19 20 



4 45 



R = 26|-° in north. 17 43 





Babinet. 



3 59 



R = 29° in zenith, and at alt. 30° E. horizon. 18° 38' 



4 5 



19 4 



4 41 



21 50 



Clouds came on, followed by great rain and wind, at 10 h p.m. 



