Adler, Felix. The Sabbath and the World’s Fair. Lecture Delivered by Prof. Felix Adler, before the Society for Ethical Culture, at Chickering Hall, January 29, 1893. New York: Lehmaier & Bro., Printers, 1893. 16 p.
Adler, Felix. Henry Ward Beecher. A Lecture by Felix Adler, Ph.D., delivered before the Society for Ethical Culture, at Chickering Hall, April 3d, 1887. New York: Lehmaier & Bro., Printers, 1887. 18 p.