208 



Sir David Brewster on the Polarization 



Mean time. 



h m 



4 45 



6 38 



7 34 



7 42 



8 5 



8 18 



8 36 



8 52 



9 3 



9 15 



9 25 



9 33 



9 45 



9 55 



10 9 



1841, June 11.— Barom. 29*8 in. Wind north-east. 



R=26|° in zenith, 



II =27° in zenith and horizon.' Arago. 



19 37 

 19 3 

 .. 19 



18 52 

 18 50 



18 32 



19 12 

 19 17 

 19 20 

 21 37 

 23 39 

 25 22 

 25 13 



Mean of observations within less than 4° of the horizon, 

 18° 40'. The evening was not so fine as yesterday. 



1841, June 12.— Barom. 29*85 in. Wind north-east. 



9 a.m. R=24|° in horizon, 26|° in zenith, and 



R=25f° about 20° alt. S.W. and S.E. 

 11 22 „ R=24±° in zenith. 

 1 p. m . R =23F in zenith. Sky fine. 



The day became cloudy, but suddenly cleared up at 8 h p.m., 

 when B = 28J° in zenith and horizon. 



8 18 

 8 36 



8 52 Therm. 50° 



9 3 

 9 15 

 9 25 

 9 33 

 9 45 



10 



Mean of observations within 

 17° 39'. 



8 25 



8 54 



9 8 .. • 



1841, June 14. — Barom. 



7 45 



7 51 



8 5 

 8 18 

 8 36 



R=26±° in N.E. 



' 





•• 



17 22 

 17 15 



R=28i°'in 



hoi 



izon. 



18 8 

 17 30 



•• 





. . 



18 42 

 18 50 

 20 52 



:; 





•• 



21 54 

 24 43 



thin less than 4° 



of the horizon, 









Babinet. 



, , 





, , 



17 13 



, . 





, , 



17 12 







• • ' 



17 20 



296 in. 







Arago. 



. , 





, , 



18 35 



N.E. 





, , 



19 15 



, , 





, , 



18 53 



. i 





, , 



18 58 



