J. LeConte on Binocular Vision. 417 
Art. LIIL—On some Phenomena of Binocular Vision ; by 
JosepH LxConrts, Prof. Geol. and Nat. Hist., University of 
California. 
If I place a piece of money on a sheet of ye lying on the 
table, and look downward in the direction of the piece, but at 
he same time gaze on vacancy, I see two heteronymous i 
of 
the pencil. If I use the 
right-eye image (left image) of the pencil p to draw the left-eye 
on vacancy, as al- 
