In geometry, an isosceles triangle is a triangle that has two sides of equal length.
Skupaj z Duganom in Stewartom je leta 1927 napisal vplivni učbenik astronomije: "Astronomija: Popravljena izdaja Youngovega Astronomskega priročnika" ("A Revision of Young’s Manual of Astronomy") (Ginn & Co., Boston, 1926-27, 1938, 1945).