282 SIK DAVID BREWSTER ON THE 



1843, November 7.— Barom. 2930, rising; fine day. 



Apparent Time. Arago. 



4 h 29 m R = 29£° maximum polarisation in zenith, 26|° in S. hor. 18° 22' 



1843, November 14. — Barom. 30*13, rising ; fine day ; wind north-west by west. 



Apparent Time. 

 4h i2 m 



4 17 R = 28° maximum polarisation in zenith plane. 



Arago. 



18° 33' 



Babinet. 

 18° 45 



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



Apparent Time. 

 4 h 36 m 



4 37 



Arago. 

 21° 32' 



Babinet. 

 18° 13' 



1843, November 29.— Fine day. 



Apparent Time. 

 3 h 31 m 



Arago. 

 14° 14' 



1 843, December 1 . — Barom. 29-94 ; fine day. 



Apparent Time. 

 4 h 10 m 



4 12 



Arago. 

 18° 8' 



Babinet. 

 19° 26' 



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



Apparent Time. 

 3 h 3 m 



3 7 R = 281°, 90° from sun. 



Arago. 



16° 58' 

 Babinet. 

 18° 11' 



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



Apparent Time. 

 3 h 34 m 



3 37 R=27° maximum polarisation in zenith plane. 



Arago. 

 18° 51' 



Babinet. 



17° 31' 



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



Apparent Time. 

 4 h 20 m 

 4 26 R=28° maximum polarisation in zenith. 



Arago. 

 18° 16' 



Babinet. 

 19° 0' 



4 38 Polarisation of moon 17 J°. 



1844, February 3. — See " Edinburgh Transactions," vol. xxiii. pp. 220, 227. 



