268 



SIR DAVID BREWSTER ON THE 



1842, April 16. 



Apparent Time 



5 h 



54 m 



6 



31 



6 



59 



7 



21 



7 



35 



7 



46 



5 



58 



6 



33 



6 



57 



7 



23 



7 



37 



Arago. 



17° 25' 



22 22 

 R = 27|° in zenith, 22£° in N. and 18|° in S. horizon. 19 50 



18 55 



45 



23 50 



R=18|° at moon. 



R = 23J° in zenith, much less in horizon. 

 R=23° in zenith, 21° in W. and 181° in E. horizon. 19 



20 

 R=29J°in zenith, and 24 J° in both horizons. 17 



R=z31° in zenith, and 29|° in horizon. 17 



Babinet. 



25° 40' 



8 



3 



45 



35 



1842, April 17.— Slight haze. 



Apparent Time. 



„ h „ 0m f Brewster's neutral point distinctly seen, R=19£° in 



5 34 



6 3 



7 35 



\ zenith, and 12° in S. horizon. 



Babinet's neutral point just risen. 

 R = 28£ in zenith plane. 



Arago. 



R=17J° in zenith, 22^-° in horizon; clear sky. 20° 10' 



Babinet. 

 19° 30' 



1842, April 18.— Barom. 30-0. 



Apparent Time. 



7 h 14m Pol. moon = 27|°, 29£° in zenith. 



7 23 



Pol. moon=:28£ , 30J° in zenith. 



Babinet. 

 18° 45' 



Arago. 

 17° 45' 



1842, April 19. 



Apparent Time. 



7 20 

 7 37 



Pol. moon 14|° and a maximum. 



22^°, and maximum 26£°. 



Arago 

 16° 35' 



Babinet. 

 18° 15' 

 19 10 



1842, April 20.— See " Edinburgh Transactions," vol. xxiii. pp. 218, 230. 



1842, April 21.— 



Apparent Time. 

 ll h 30™ R=23|-°, maximum at 90° from sun. 



1 10 R=25£°, maximum at 90° from sun. 



7 20 

 7 48 



7 22 



A fog came on. 



p. 222. 



Arago. 



17° 55' 

 14 24 



Babinet. 

 20 15 



