254: 
A mode of taking Stereoscopic [no. 4, new series, 
Scale of Inches, 
2. 
' / 
P o 
A o\ 
All parts of slider and front of Camera should be carefully 
blacked, the slider should move freely between the partitions, 
uhicli should not however be too far spent so as to admit light. 
P position of Pivot for Stereoscope pictures. 
A do. for single pictures. 
Slider half size. 
the form re- 
presented in 
Figs. A. and 
D. the Lenses 
being merely 
fitted into the 
shifter E. as in 
the accom- 
panying figure 
so as to ren- 
der it unneces- 
sary to injure 
the Original 
Camera by re- 
moving the 
screw ring. 
In taking a 
picture, ' the 
lens being at 1 
Fig. A., the ex- 
posure for the 
first picture is 
made in that 
position, the 
lens is then 
closed and 
shifted to 2, 
the exposure 
made and the 
pictures are 
completed. 
After printing 
however, the 
pictures are in 
their wrong 
position and 
require to be 
