(5) For a more detailed description of the collection analysis of fox urine see: JW Jorgenson, M. Novotny, M. Carmack, GB Copland, SR Wilson, S. Katona, and WK Whitten, Science, 199, 796 (1978).(6) WK Whitten, M. Wilsori, SR Wilson, JW Jorgenson, M. Novotny, and M. Carmack, unpublished results.