Transactions Society Naval Architects and Marine Engineers, Vol. 24, 1910. Plate 3. 
To illustrate paper on “New Method of Indicating the Density of Smoke as Installed on the 
U. S. S. Conyngham,” by Rear Admiral R. T. Hall, U. S. N., Member. 
Fic. 3—SrELENIUM PLATE. 
