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Subseries consists of Leon Bankoff notebooks primarily regarding the arbelos of Archimedes.

Subseries consists of Leon Bankoff manuscript material primarily regarding the arbelos of Archimedes.

Handwritten bound notebook regarding the arbelos as well as material by Clayton W. Dodge.

Two copies of the work "A special property of the shoemaker's knife of Archimedes", drafts of "The shoemaker's knife of Archimedes" beginning "The recent publication of a reprint...", as well as mimeographed copies of: "The shoemaker's knife of Archimedes", Order of Magnitude, Pasadena City College, May 12, 1938; "The shoemaker's knife of Archimedes"; "The shoemaker's knife of Archimedes", Math Council, Pasadena City College, November 21, 1955.

Handwritten solutions, solution addressed to [Howard] Eves, and published articles by Victor Thébault titled "A propos du tranchet" and "Sur le tranchet d'Archimède".

Handwritten arbelos notes.

Solutions by Leon Bankoff and other individuals, photocopies of articles about Paul Erdos, and letters to Clayton W. Dodge from Paul Yiu, Jiro Fukuta, Peter J. Wood, and Underwood Dudley.

Photocopied, print, and handwritten material including the following solutions by Leon Bankoff: "A geometrical coincidence"; "The bat"; "A streamlined proof of Morley's theorem"; "The asymmetric propeller"; "A mere coincidence"; "A 'between-patients' proof; "Arctan 1 + arctan 2 + arctan 3=π"

Reprint of Leon Bankoff article titled "Are the twin circles of Archimedes really twins?", Mathematical Magazine, V. 47, no. 4 (September-October 1974), p. 214-218), as well as holograph materials of various solutions and research materials including works by other authors including John Satterly, V. Thébault, Thomas Muir, Martin Gardner, M.G. Fontené, F. Soddy, J.H. Weaver, and I.J. Adams.

Two copies of offprint of Leon Bankoff article "The golden arbelos" from Scripta mathematica, vo. 21 (1955), p. 70-76.