This is a repeat, by popular request, of the discussion of Galileo from Dr. Peikoff's course "Induction in Physics and Philosophy," given last summer in Palo Alto; it does not contain new material. Topics include: the nature of experimentation; the pendulum experiments; the discovery that motion has two components; the Law of Free Fall; Galileo's new concept of "speed" as a "green light" to his inductions; four roles of measurement in Galileo's scientific work.