218 



SIR DAVID BREWSTER 



April 13.- 



-Bar 



om 



.3012. 



Apparent Time. 







K= 



In Zenit 



5h 48m P.M. 









6 20 „ 







29 



6 54 „ 







2H 



7 10 „ 







. • ■ 



7 19 „ 







30^ 



7 64 „ 









Fine day. 



Maximum Polarisation, 

 th. In Horizon. 



221 



Height of Neutral Point above 



the Antisolar Point. 



16= 



20' 



17 



55 



19 



40 



19 



45 



19 



4 



22 



10 



At 7^ 32" the maximum polarisation was 32i, the greatest ever observed. 

 (See p. 250.) 



1842, April 20.— Barom. 3002. 



Apparent Time. 



5h 50m P.M. 

 6 29 „ 



6 59 „ 



7 45 „ 

 7 59 „ 



1842, April 20.— Barom. 3000. 

 night. 



Apparent Time. 

 5'' 211" p.ji 



6 6 „ 



6 38 „ 



7 9 „ 

 7 32 „ 



1842, April 29. 



Apparent Time. 



Wind west ; very fine day. 



Height of Neutral Point above 

 the Antisolar Point. 



22° 



50' 



19 



21 



20 



55 



20 



10 



24 



8 



Not a cloud in the sky from morning till 



Height of Neutral Point above 

 the Antisolar Point. 



5h 54m p jj. 



6 1 „ 

 6 45 „ 



1842, May 15.— A haze. 



Apparent Time. 



6^ 29™ P.M. 



6 46 „ 



7 26 „ 



8 26 „ 



R^Maximum Polarisation. 

 In Zenith. In Horizon. 



15° 



20i 

 23* 



15° 



1842, November 14,— Barom. 29-6. Fine frosty and clear morning. 



Apparent Time. 



R==Maximum Polarisation. 

 In Zenith. In Horizon. 



8^ 55" AM. 



9 3 „ 



9 16 „ 



9 31 „ 



9 43 „ 



9 48 „ 



251° 



19i 



13° 



43' 



13 



51 



19 



28 



20 



10 



19 



15 



Height of Neutral Point above 

 the Antisolar Point, 



18° 



4' 



18 



35 



22 



25 



Height of Neutral Point above 

 the Antisolar Point. 



28° 



35' 



28 



12 



24 



6 



19 



59 



lear morning. 



Height of Neutral Point above 

 the Antisolar Point. 



19° 



50' 



18 



40 



15 



22 



15 







14 



30 



13 



45 



