New York: John Wiley & Sons, Inc. 1917. First Edition. v, 194 pages. Small 8vo. Publisher's blue cloth gilt. A bright clean copy. From the author's library with his signature on the front pastedown endpaper. Near Fine. Cloth. 
A work by MIT Professor H. B. Phillips, author of Vector Analysis, Calculus, Differential Equations, Analytic Geometry and other works which were translated into many languages.