One of the unusual features of the 1904 edition of Granville's calculus, a book I have described as the first 20th century calculus text, is a final chapter called "Integraph. Table of Integrals." In this chapter, Granville describes the theory and operation of a machine that draws integral curves by tracing a given curve. Later editions describe not only the Integraph, but also polar planimeters. By the 1941 edition, this material had disappeared. I will examine the operation of the relatively simple Integraph and speculate on the reasons for its inclusion in the text.