568 OBSERVATIONS ON THE ZODIACAL LIGHT. 



No. 284 



JANUARY 10th, 1855: Monmxo. 



Lat. at 4h., 5 57' S. :Lon. 81 52' W. 



Sun rose at HA 2m. 

 Stronger and Diffuse Light at 3A. and 4A. 30m. 



Was'on deck at 3 o'clock. Found the sky only tolerably favorable ; not very bright, and clouds also passing. 

 The boundaries easily got on the northern side, where they were well marked, and the change from, the Zodiacal Light 

 brightness to the darker sky is sudden and well defined ; but, on the southern side, the change is scarcely perceptible, 

 the sky beyond the boundaries still keeping a considerable degree of brightness. On that account, I could not get 

 the boundaries of the Diffuse Light on the southern side. (A very heavy dew falls now at night.) At 4" 3CT 1 , the 

 atmosphere dim. The Zodiacal Light was bright up to the zigzag x, but not at its brightest. Very difficult still 

 to get reliable boundaries on the southern side. At 4 h 35 m , up to x, brightening ; 4" 40 m , do. do. ; but clouds near 

 the horizon and the dimness of the sky discouraged me from further efforts at observations. 



