SOUTH. 



WEST 



EAST. 



Plate II.-THE REGION AROUND COPERNICUS, AS SEEN WHEN THE MOON WAS 



265 HOURS OLD. 



1890 The tn'^hV^^^ f '''^°*°-r' ^ *t ,™ f *''" ^''"' ^'^^^'-^tory, by MM. Pafl and Prosper He^by. on the 29t,h of May. 

 Ibyo. Ihe sensitive plate was placed behind an eye-piece which enlarged the image in the principal focus of the 13.incl 

 photographic refractor used in the International Surrey of the Hearens. piincijai rocu. or id-incli 



Direct Phalo Engraving Compantj, 9, Bmmbui-y Pari:, N. 



