Bui. U. S. B. F. 1907. 



PLATE V. 



FIG. I. PHOTOGRAPH SHOWING THE METHOD OF USING THE REFLECTING CAMERA WHEN 

 INCLOSED IN THE WATER-TIGHT BOX FOR SUBAQUATIC WORK. 



The upper part of the box covering the ho<Kl rises above the surface, while the lower part, containing 

 the camera proper. i> under water. The operator is looking into the hod through the plate glass 

 in the top of the box. With his right hand he focuses : with his left makes the exposure. 



FIG. 2. GALVANIZED-IRON BOX WITH PLATE-GLASS FRONT, DESIGNED BY THE WRITER TO 

 CONTAIN A 5 BY 7 REFLECTING CAMERA WHEN USED UNDER WATER. 



For description see text, page 6'J. 



