Erratum.
A line was inadvertantly omitted from the last sentence of George S. Mumford's letter of 20 January (p. 238). It should have read, "If, at an early stage, we could foster in this manner a feeling among our graduates of their indebtedness to the general public for directly or indirectly supporting their research and the right of that public to know the results, it might become traditional for them to proceed in such a way throughout a career."