"My Time With X-Rays and Crystals" was originally published for the International Union of Crystallography in 1962 in P. P. Ewald (ed.), Fifty Years of X-Ray Diffraction (Utrech: A Oosthoek): 629-636. It was re-published in Marjorie Grene (ed.), Knowing and Being: Essays by Michael Polanyi (London: Routledge and Kegan Paul, Chicago: University of Chicago Press, 1969): 97-104.
This pdf version of the essay is made available on the International Union of Crystallography web page on which the entire original book resides: http://www.iucr.org/iucr-top/publ/50YearsOfXrayDiffraction/polanyi.pdf