The revision to chapter of the calculus text "Calculus With Analytic Geometry: A First Course" by Murray H. Protter and Charles B. Morrey, Jr. [Addison-Wesley, 1963] was written in the 1969-1970 school year. I couldn't understand the original text; rewriting the material was my method for learning it. (Later on I learned to spell theorem and argument.) Scanned from a copy of the typescript on December 26, 2018.