There can be no doubt that the migration of German and Austrian philosophers to North America as a result of Adolf Hitler's rise to power had a profound effect on twentieth-century scientific philosophy in general, and on philosophy of science in particular. Robert Butts's essay contains a great deal of enlightening information on this topic, but it is, so to speak, a view from east of the Mississippi River.¹ Since my entry into philosophy of science occurred in California, I should like to add a view of the subject from the West Coast.