Mathematical recreations and problems of past and present times.

Some arithmetical questions.--Some geometrical questions.--Some mechanical questions.--Some miscellaneous questions.--Magic squares.--Unicursal problems.--Three geometrical problems.--Astrology.--Hyper-space.--Time and its measurement.--The constitution of matter.

Dr. Bernard Bolzano's Paradoxien des Unendlichen /

Mode of access: Internet.

Mathematische Spiele.

Mode of access: Internet.

Geheimnisse der Rechenkünstler,

Mode of access: Internet.

Lustiges und Merkwürdiges von Zahlen und Formen; Beispiele aus der Unterhaltungsmathematik,

Bibliography: p. 8-11.

Mathematische Mussestunden; eine Sammlung von Geduldspielen, Kunststücken und Unterhaltungsaufgaben mathematischer Natur.

Mode of access: Internet.

Paper folding for the mathematics class /

Includes bibliographical references (p. iv).

Scientific amusements in philosophy and mathematics : including arithmetic, acoustics, electricity, magnetism, optics, pneumatics : together with amusing secrets in various branches of science, the whole calculated to form an agreeable and improving exercise for the mind /

Mode of access: Internet.