New Vocation

Tomorrow’s Food, by James Rorty and N. Philip Norman, M.D. 297 pp. New York: Devin-Adair. $3.95

Once upon an unstandardized time, every small town had its own miller to grind the wheat and its own baker to convert the flour into bread. Nowadays, the word “miller,” except as a surname, is hardly known outside fairy tales. A “baker” is a foolish man whose wife committed adultery in a French movie. And our Daily Bread is “vitamin-enriched,” double-sealed