SOUTH 







*^ 



WEST. 



vY' 



.11 



EAST 



PHOTOGRAPH OF THE CENTRAL PORTION OF THE MOON WHEN 136 HOURS OLD. 



Taken bv MM. PArr, and PnosPER Henry, witli their :3-inch refractor, at the Paris Observatory, on the 23rd Marcli, 1«93. Tlic ►cii.-itixe plate 



was placed behind an eve-piece which enlarged the image in the principal focus sixteen times. 



