Callender's Slide Rule
name: label: Series Creator
content: Warshaw, Isadore, 1900-1969
setName: label: See more items in
content: Warshaw Collection of Business Americana Subject Categories: Tools
label: See more items in
content: Warshaw Collection of Business Americana Subject Categories: Tools / Genre / Promotional Material
unitdate: label: Date
content: undated
container: label: Container
content: Box 10, Folder 2
dataSource: label: Archival Repository
content: Archives Center, National Museum of American History
objectType: label: Type
content: Archival materials
label: Type
content: Realia
scopecontent: label: Scope and Contents
content: Board mounted calculation device for determining the sizes of cables, with instructions printed on verso.  Has multiple slide gauges. Patent No. 27683 of 1906.