The first settling tank. The wood silt becomes water logged and goes to the bottom. The rubber floats, together with some cork, the latter being removed by forcing water into the air cells of the cork under 350 pounds pressure, which sinks in the settling tank. This picture is out of order, and should be in following the next two. :29

Courtesy of UC Berkeley, Bancroft Library

http://www.oac.cdlib.org/ark:/13030/tf3x0nb3kv/?order=1

Title:

The first settling tank. The wood silt becomes water logged and goes to the bottom. The rubber floats, together with some cork, the latter being removed by forcing water into the air cells of the cork under 350 pounds pressure, which sinks in the settling tank. This picture is out of order, and should be in following the next two.

Contributing Institution:

UC Berkeley, Bancroft Library