220 



SIR DAVID BREWSTER 



1843, March 25.— Barom. 29-97. 



Apparent Time. j^ Zenith. In Horizon. 



4'* 35™ A.M. 25° Neutral point in horizon. 



5 15 „ 



5 44 „ 28 



6 9 „ 29J 



the Antisolar Point. 



10° 0' 



11 30 



18 31 



17 30 



1843, June 21. — Barom. 29-75. Fine day; wind west 



Apparent Time. 



R=Maximum Polarisation. 

 In Zenith. In Horizon. 



Height of Neutral Point above 

 the Antisolar Point. 



7h 



12=1 A.M. 



7 

 8 

 9 



44 „ 

 30 „ 

 16 „ 



27i° 



29 

 30 



rN.pt.in| 

 ( horizon j 



9° 



16° 



19 



18 



401' 



31 



22 

 29 



1844, February 3. — Barom. 29-90. Snow covering the ground. 



Apparent Time. 

 4^ 7™ A.M. 



R=:Maximum Polarisation. 

 In Zenith. In Horizon. 



26° 



23° 



Height of Neutral Point above 

 the Anlisolar Point. 



18° 20' 



1844, February 21. — Barom. 29-28. Snow partially covering the ground. 



Apparent 



Time 



s^ so^ 



A.M. 



4 



40 



» 



4 



13 



»» 



4 



40 



)> 



In Zenith, 



27° 

 28i 

 28| 



In Horizon. 



1844, June 10.— Barom. 29-70. 



A.M. 



Apparent Time. 



7*' 36" 



7 44 



8 11 

 8 52 



K ^Maximum Polarisation. 

 In Zenith. In Horizon. 



24| 

 27i 



22^ 

 23^ 



the Antisolar Point. 



13° 



3' 



12 



35 



17 



34 



19 



24 



Height of Neutral Point above 



the Antisolar Point. 



21° 



20' 



21 



20 



21 



35 



21 



50 



1844, June 13. — Barom. 29-4. Windy ; wind south-west. 



Apparent Time. 



7" Om A.M. 

 7 12 „ 



R=Maximum Polarisation. 

 In Zenith. In Horizon. 



Height of Neutral Point above 

 the Antisolar Point. 



Neutral point in horizon. 

 24i 



20* 



ir 



13 



10' 



2 



In the following observations, the altitude of the sun was not estimated. The 

 numbers in the fourth column are the altitudes of the neutral point above the 

 horizon. 



1845, April 15. 



Apparent Time. 



5^ 48™ A.M. 

 6 48 „ 



R^Maximum Polarisation. 

 In Zenith. In Horizon. 



26i° 

 27i 



221° 

 241 



Height of Neutral Point above 

 the Horizon. 



7° 25' 

 18 55 



