TRANSACTIONS OF THE SECTIONS. 



33 



either (C) or (A) ? The author has not yet detected hypsometrical evidence of this : 

 ot has there been some tendency in the direction of Burckhardt to produce cracks 

 and fissures from the two small craters N.W. and S.E. of it ? 



Epoch ten to fourteen days of the moon's age. 



Mid-day illumination of the lunar area between the angular points Burckhardt, Bernoulli ; 

 B a crater on the southern margin of Messala and the crater a*- 



Relative positions, approximately, from Beer and Madler's large map. 



Names and Roman characters refer to Beer and Madler's large map. 



Arabic numerals to features observed by the author, described in the accompanying paper, 

 and not described elsewhere, so far as the author is aware. 



Drawn from sketches taken at intervals between April and July 1859. 



1859. 3 



