Stratospheric ClO and O3 vertical profiles were measured at 32¿ N in May 1985 and October 1986. The ClO profiles and diurnal variation are in general agreement with theory, but have somewhat less midday ClO near 34 km. Measured 35--45 km O3 is larger than theory and no stratospheric O3 diurnal variation was observed, as expected. HNO3 was detected, and an H2O2 upper limit obtained. ¿ American Geophysical Union 1988