480 A. E. CONRADY, RESOLUTION WITH DARK-GROUND ILLUMINATION, 



with in this paper was not original with me, I wish to say that 

 the bare results as stated in the paper under (1) and (2) were 

 communicated privately to a well-known author, and were, with 

 my consent, embodied by him in a letter appearing in the' 

 January number of Knovoledge (p. 37). As a matter of fact 

 I revised the proof myself to make sure of a correct statement. 



Jo'ara. (^uekett Micrcscopical Club, iSer. 2, Vol. XL, A^o. 71, November 1912. 



