Anyone else use mathematical textbooks from around 1950? I do... by accident... Tend to pick them up in thrift stores where they just get dropped, discarded... But, I find them engaging! Many of them are around 1950. It is also a little fun to see how mathematics has progressed. For example, my General Mathematics Volume 1 assumes there is no simple divisibility test for 7. Well, he was wrong. I was just wondering if anyone else even uses these volumes now. Let me know if any of these sound familiar. Algebra for Beginners including Easy Graphs by Hall and Knight - 1950 Calculus made easy by Sylvanus P. Thompson F. R. S. - 1948 General Mathematics Volume 1 by C. V. Durell - 1952 and Elements of Analytical Geometry by J. T. Brown & C. W. M. Manson - 1957 Much gratitude for replies, Mahmoud.