Received for publication November 1, 1977. Journal Series Paper No. 5 393 of the Agricultural Experiment Station, The Pennsylvania State University. The authors gratefully acknowledge the assistance of Joseph A. Lanza and Donald E. Horst (Musselman Fruit Products Division, Pet, Inc.), J. Richard Cogley (Knouse Foods Cooperative, Inc.), and Rodney L. Shaffer.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper must therefore be hereby marked advertisement solely to indicate this fact.