String Figures and other monographs, Chelsea, New York, 1960. $3.95. - String Figures, by W.W.R. Ball. Third edition, 1920. 72 pages. - Methods and Theories for the Solution of Problems of Geometrical Construction, by J. Petersen (translated from the Danish). 1879. 102 pages. - The Elements of Non-Euclidean Plane Geometry and Trigonometry, by H. S. Carslaw. 1916, 179 pages. - History of the Logarithmic Slide Rule and Allied Instruments, by F. Cajori. 1909. 136 pages.
Hanna Schwerdtfeger · Canadian Mathematical Bulletin · 1960
String Figures and other monographs, Chelsea, New York, 1960. $3.95. - String Figures, by W.W.R. Ball. Third edition, 1920. 72 pages. - Methods and Theories for the Solution of Problems of Geometrical Construction, by J. Petersen (translated from the Danish). 1879. 102 pages. - The Elements of Non-Euclidean Plane Geometry and Trigonometry, by H. S. Carslaw. 1916, 179 pages. - History of the Logarithmic Slide Rule and Allied Instruments, by F. Cajori. 1909. 136 pages. - Volume 3 Issue 3