18 Steps:
Joseph H Thywissen (University of Toronto)
     |    (grad student for)
Mara Prentiss (Harvard University)
     |    (grad student for)
Shaoul Ezekiel (Massachusetts Institute of Technology)
     |    (grad student for)
Walter Wrigley (Massachusetts Institute of Technology)
     |    (grad student for)
Charles Start Draper (Massachusetts Institute of Technology)
     |    (grad student for)
Philip M. Morse (Massachusetts Institute of Technology)
     |    (grad student for)
Karl Taylor Compton (Massachusetts Institute of Technology)
     |    (grad student for)
Owen Willans Richardson (Cambridge, Princeton, King's College)
     |    (grad student for)
Joseph John Thomson (University of Cambridge)
     |    (grad student for)
Edward John Routh (University of Cambridge)
     |    (grad student for)
William Hopkins (University of Cambridge)
     |    (grad student for)
Adam Sedgwick (University of Cambridge)
     |    (grad student for)
Thomas Jones (University of Cambridge)
     |    (grad student for)
Thomas Postlethwaite (University of Cambridge)
     |    (grad student for)
Stephen Whisson (University of Cambridge)
     |    (grad student for)
Walter Taylor (University of Cambridge)
     |    (grad student for)
Robert Smith (University of Cambridge)
     |    (grad student for)
Roger Cotes (University of Cambridge)
     |    (grad student for)
Isaac Newton (Royal Society of London)