Improvement in the Lenticular Stereoscope. 407 
ee the under side of the lenses and their mechanical 
attachment. 
This apparatus takes the place of the lenses in the various 
forms of the lenticular stereoscope. We have adjusted our own 
to a common hand-stereoscope merely flanging the sides so as to 
afford a view of glass and paper slides measuring ten inches in 
length by four inches in width. 
A. 
ABCD, eh brass frame in which the — slide. 
R, ht-hand lens, L, left-hand le: 
G, nai oe » the setting of the gee lens through which a right-hand 
H. 
9 
nut attached. to the setting of the left lens, through which a left-hand 
sere 
) Milled 1 hea ot the end of the rod upon which is cut hag right-hand screw 
for th and also the left-hand screw for the 
By turning the milled head E the lenses either advance somes each other or 
recede from each other as may be desire 
By means of this instrument, whatever the distance between 
the eyes, pei may be easily and perfectly united which are 
mounted at any distance apart between two, and four and a half, 
inches from centre to centre; and this, too, with the ordinary 
Stereoscopic lenses; if achromatic lenses are used, it is — 
practicable to unite pictures which measure five inches 
Centre to centre, affording a view filling twenty square inches, 
cay is considerably more than twice as large as the ordinary 
Troy University, Oct., 1861. 
