#416, This picture shows the primary screens for the preparation of coarse salt.  The few impurities present in the salt are picked out by the men shown in the foreground
name: label: Collection Creator
content: International Salt Company
label: Collection Creator
content: Costain, Harold Haliday
label: Collection Creator
content: Rittase, William M., 1894-1968
setName: label: See more items in
content: International Salt Company Records
label: See more items in
content: International Salt Company Records / Series 3: Photographs / 3.2: William Ritasse
unitdate: label: Date
content: circa 1934
container: label: Container
content: Box 6, Folder 6
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Photographs