APPARATUS FOR MAKING PHOTO-MICROGRAPHS. 
1. Heliostat, to be phiced on shelf outside of window, 
2. Tube, to be placed in darkened window, having eight-inch 
lens at outer extremity, and ammonia-sulphate of copper 
cell at inner extremity. 
3. Microscope. 
j. Frame, containing ground-glass sereen upon which the 
image is projected for photographing. 
Teliotype Printing Co., Boston, 
