S. Rowley on Vision. 163 
through the centers of two adjoining wafers, each axis throu 
that center lying on its own side, and presently all the visible 
An experiment of the same kind may also be made by means 
of the similar figures lying at equal distances in the surface of 
to his consciousness, take its true visible position at the dis- 
‘ance of the convergence of the axes—the images of the 
ig =e er 2. ' the 
Point of convergence is less or greater. A variation (from the 
oe of the distance between the centers of the figures of 
