4 J. LeConte on Binocular Vision. 
peculiar, results both of natural and inverse perspective, pro- 
duced by the combination of stereoscopic pictures with the naked 
eye by squinting. I find that I am able to combine stereoscopic 
pictures in this way, quite as easily or even more easily than 
with the stereoscope. The results by this mode of combination 
differ from ordinary stereoscopic results in several respects. 
ist. In combining on és side a“ plane of the pictures by 
squinting the right-eye image of the left picture, combines with 
the lefi-eye image of the right pistes while in combining 
beyond the plane of the pictures as in ordinary stereoscopic 
ee ies it is the right-eye image of the ec picture, and 
the binocalar result. This 1 ident n comparing with 
fig. .d. Besides the entre result there are - course 
ec monocular pictures on the right and ; while 
in the stereoscope these monocular pictures (which, howe an in 
this case would be heteronymous) are cut off by the septum. 
3d. The onrneres result, instead of being magnified as in the 
stereose is seen in exquisite miniature and has all the charm 
of miniature nine 4th. The depth of perspective is pro- 
portionally less than in —— beyond the car th. 
he perspective is always the reverse of that given by the 
stereoscope, and hee in order to produce the same per- 
sg oe mounting must be reverse 
nary stereoscopic photogra raphs be reversed and the 
oats of then combined with the naked eye by squinting, 
the gehen effect is as perfect as can be imagined. Minia- 
ture houses, gardens, lawns, statuettes, fountains, &e., such as 
Gulliver pete have seen in the land of Lilliput, are presented 
in perfect perspective. I have often amused myself by changing 
the mounting of stereoscopic pictures in order to enjoy the 
nan effect. Of course in order that sents should be per- 
efinition of the objects, there must be complete dissocia- 
i of the focal and axial adjustments, as seats explained in 
my first paper.* If stereoscopic pictures are combined by 
squinting without reversing the mounting, then of course the 
* This Jour., II, vol. xlvii, p. 68. 
