Science. 



N. S. Vol. III., Plate 3. 



Fig. 1. Leather case containing eye-glasses. Cig.ir case of iilurainium f^ ineli thick, containing scissors, 

 knife, etc. Exposure 1 hour ( M. I. PUPIN). 



Fig. 2. Fingers taken with e.xposure of 20 minutes (E. B. Fkost). 



