*In contributing to this memorial number ofReviews of Modern Physics dedicated to John Torrence Tate, I am particularly pleased to write on the subject of the coupling of angular momentum vectors in molecules, for this is a topic on which I was collaborating with E. L. Hill at Minnesota in 1926-27, during Professor Tate's first years at Editor-in-Chief. Although he was not a specialist in our particular field, his interest in our work, and his encouragement of it, were a real assistance. I fondly recall the impromptu office party which J. W. Buchta, then a young instructor, arranged to celebrate Tate's inaugural role as Editor-in-Chief. The subsequent years have certainly more than justified our satisfaction that he accepted this position.
