John Esselen, II was born in Roxbury, Massachusetts,
June 30, 1888, the son of Gustavus J. and Joanna Blyleven
Esselen. All of his higher education was obtained at
Harvard University where he was awarded the A.B. (magna
cum laude) in chemistry in 1909 and a doctorate in 1912.
In that same year he married Henrietta W. Locke who with
three children survived him at the time of his death
on Oct. 22, 1952.