Ch. VI] DRAWING BY THE AID OF PHOTOGRAPHY 



177 



§ 287. Negatives by the camera. — The object is arranged as 

 desired and placed in a good light. A photographic camera is then 



Fig. 107. Vertical Photographic Camera on a Low Table. 



T Table about 50 cm. high and 50 cm. by 70 cm. on the top. 



cl d Drawer with combination lock. 



Base The heavy base of the vertical camera support. 



p Pillar in which the graduated rod (vgr) rotates. 



ss Set screw to fix the graduated rod in any position. 



c s, c s Set screws to enable the operator to set the camera bellows at any 

 desired extension. 



mr Magnification rod with its set screw rs. When any desired magnification 

 is arranged, the rod set screw is tightened; then by loosening the 1 aim ra set s< rews 

 (cs) the bellows can be moved up and down on the graduated rod to get the focus. 



Fs Focusing stand; this is a microscope stand with coarse and line adjust- 

 ment (cf) and two stages (5/, si) for supporting the object or the dish containing 

 it (sp c) 



Ob Photographic objective in the lower end of the camera. 



VC Vertical camera bellows. 

 fg Focusing glass. 



used and a negative on glas> made in the usual manner. If the 

 negative is to be used for prints on which to trace and draw with 



