Biographical sketch of Henry Crew written by his son, William Henry Crew. Outline of Henry Crew's undergraduate and graduate eduction at Princeton University and Johns Hopkins University under Henry A. Rowland; his work in Berlin under Heinrich Helmholtz; postdoctoral work at Johns Hopkins, and teaching at Haverford College; a year as an astronomer at Lick Observatory; his marriage to Helen Coale; and his appointment as Fayerweather Professor of Physics and department head at Northwestern University. William Crew also describes his father's work with Edward E. Barnard, Sherburn W. Burnham, Edwin Frost, George Ellery Hale, George W. Hough, George V. McCauley, and members of other Northwestern University departments. Also covers Crew's years at Northwestern University in terms of research, teaching, and his work in history of physics, including his translation of Galileo and his book entitled Rise of Modern Physics; and his other activities. File also includes a one-page eulogy issued by Northwestern University.