Book Reviews On Knowing. Essays for the left hand. Jerome S. Bruner. Harvard University Press, Cambridge, Mass., 1962. 165 pp. $3.75 + See all authors and affiliations Science 25 Jan 1963:Vol. 139, Issue 3552, pp. 323DOI: 10.1126/science.139.3552.323 Jacques BarzunFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.