Only two additional papers follow: a valuable discussion by Stig Eliasson of the need to recognize that some phonological rules are bidirectional, contrary to the generative view of them as all unidirectional; and a detailed study (Lyche) of the deletion of French schwa as seen in natural generative phonology. Language in Society regrets the errors. D. J. ALLERTON, EDWARD CARNEY, & DAVID HOLDCROFT (eds.), Function and context in linguistic analysis. A festschrift for William Haas. Cambridge University Press, 1979. Pp. viii + 228. It is a pleasure to note this well-deserved tribute to the scholar and linguist, William Haas, on the occasion of his retirement as Professor in the Department of General Linguistics at the University of Manchester. The book contains a short biography (1-3) and "The work of William Haas: An overview" by the editors (4-26), followed by a select bibliography (27-9). The distinguished group of contributors includes C.