One of several films produced by Bruce and Katharine Cornwell for the Mathematical Association of America in the mid-1960s addressing topics in calculus. This is from a damaged and very faded print. Some white graphics and text are nearly invisible despite sharpening and color balancing efforts, and three missing segments of unknown duration are marked in the introduction. If you know of the existence of a better quality print, please let me know.
This film is copyrighted by the MAA, not by Bruce and Katharine Cornwell. No rights to re-use are granted by Eric Cornwell in posting it here. Special thanks to Greg Javer for locating and converting a 1992 MAA video compilation by John Emert, Robert Brinkley, and Jerry Cole at Ball State University.