300 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 150. 



MAT 6th, 1854: MORNIKG. 



Lat. aj 40' N. i Lon, ias 59' E. 

 Sun rose 6A. 10m. 



ISA. 20m. -, 

 3 ^ i Diffuse 2A. 30. and 3A 45ra, 

 3 50 j 



Clouds nniformly since ray last date, until this morning. Was on deck at 2 h 30, and again from 3 o'clock till 

 dawn, watching carefully, and noting down boundaries as I could get them. But these morning observations are 

 very unsatisfactory. There is now always some haziness (the sun, at mid-day, not giving a full and clear light) ; 

 and the angle between the ecliptic and the horizon is small towards morning. Jupiter's light also produces 

 embarrassment. In my efforts at getting the upper end of the Zodiacal Light, I had to note clown portions of the 

 boundaries this morning, at different times, as I was able to make them out. It seemed to me that the Zodiacal 

 Light was more decided at 2 11 30 m than at 3 h 45 a . Indeed, at the best, I should scarcely have known where to draw 

 the boundaries, if former knowledge had not come to my help. This morning's result, therefore, can scarcely be 

 considered an independent one. Dawn about 4 o'clock. 



