266 



SIR DAVID BREWSTER ON THE 



1842, March 18. — Barom. 2909. Wind and rain, day cold, and wind in west. 



Apparent Time. 



3 h 27 m R = 25°, diminishing to 20°. 

 5 28 



R=30° in zenith plane. 



5 



55 



6 



12 



5 



30 



5 



57 



6 



10 



Arago. 

 15° 48' 

 18 10 

 17 48 



Babinet. 

 19 : 10' 

 17 40 

 20 12 



1842, March 19.— Barom. 290. 



Apparent Time. 



3 h 54 m Polarisation of moon, 20i°; R = 23° in zenith. 

 4 39 R= 24° in zenith plane; sky very clear. 



Polarisation of moon, 20|°; R = 22J°in zenith. 

 R = 2fjJ° in zenith plane. 



1842, March 24.— Cleared up at l h . Fine day. 



5 



44 



6 



14 



6 



19 



5 



48 



6 



12 



6 



21 



Arago. 

 10° 37' 

 19 45 

 18 47 



18 45 



Babinet. 



19° 30' 



19 45 

 17 26 



Apparent Time 

 2 h 

 4 R = 20|° in zenith plane. 



m R=22i° 50° above the horizon. 



1842, March 26. — Barom. 29-3. Cold wind from point north of west. 



Apparent Time. 

 5 h 49 m 



16 

 31 



5 52 R= 281° in zenith plane. 



6 34 



Arago. 

 18° 32' 

 19 25 



18 4 

 Babinet. 

 19° 20' 



19 40 



1842, March 28.— Sky clear. 



Apparent Time. 



4 h 20 m R = 26^° in zenith plane, and 18 c and 20° in horizon. 



1842, March 29 h . 



Apparent Time. 

 6 h 20 ra 

 6 36 



6 18 



1842, March 30.— Wind ; flying clouds. 



Apparent Time. 



6 h 27 m R = 28i°in zenith, to 23£° in horizon. 

 6 45 

 6 52 

 6 24 



48 

 10 



R=r21|° in zenith plane. 



Arago. 

 17° 55' 

 17 50 



Babinet. 

 18° 40' 



Arago. 

 18° 13' 

 17 55 

 19 37 



Babinet. 

 20° 40' 

 19 54 



