Sketch (L) of method of underwater photography used by Carl Louis Gregory in 1914. Carl Louis Gregory estate, courtesy of Ralph Graham, M.D.

Kind

Document

Collection

Thanhouser Films CD (TCOCD)

Pixels

450 × 356

Identifier

tcocd-m-3

This is a web derivative made in the 1990s, not a scan. At 450px wide it is the largest copy known to exist here; if you hold the original, we would like to hear from you.