1. This document is 4HHSL20 of the Florida 4-H Youth Development Program, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published; 1965, revised; October, 1990; Reviewed J 200. Please visit the EDIS website at http://edis.ifas.ufl.edu. 2. Debbie Glauer. Publication contact: Nancy Johnson, 4-H Publication Coordinator, Department of Family, Youth and Community Sciences Cooperative Extension Service, Institute of Food and Agricultural Sciences, Universi ty of Florida, Gainesville 32611. COOPERATIVE EXTENSION SERVICE, UNIVERSITY OF FLORIDA, IN STITUTE OF FOOD AND AGRICULTURAL SCIENCES, Christine Taylor Waddill, Director, in cooperation with the United States D epartment of Agriculture, publishes this information to furthe r the purpose of the May 8 and June 30, 1914 Acts of Congress; and is authorized to provide research, educational information and other services only to individuals and institutions that function without regard to race color, age, sex, handicap or national origin. The informati on in this publication is available in alternate formats. Single copies of extension publicat ions (excluding 4-H and yout h publications) are availabl e free to Florida residents from county extension offices. In formation on copies for out-of -state purchase is availabl e from Publications Distri bution Center, University of Florida, PO Box 110 011, Gainesville, FL 32611-0011.