Background
Kaempffert, Waldemar Bernhard was born in September 1877 in New York City, New York, United States.
Kaempffert, Waldemar Bernhard was born in September 1877 in New York City, New York, United States.
Assistant editor of the Scientific American, 1897-1911, mng. Editor, 1911-1915; editor Popular Science Monthly, 1915-1920. Director Mus; Editor: A Popular History of American Invention, 1924.
Married Carolyn Lydia Yeaton, January 7, 1911 (died 1933).