Notes
The experimental investigations connected with this article were carried out in the Phonetics Laboratory of the University of Chicago. I am very grateful to Professor Clarence Parmenter for permission to use the equipment as well as for his advice. Thanks are also due to Abraham Halpern, Caleb Bevans, Bert Emsley, Elbert R. Moses, Jr., for their helpful suggestions, and to my informants for their kind patience. In modified form, the paper was read at the Eighteenth Annual Meeting of the Linguistic Society of America.