Analyses are presented of the association between two parameters of solar activity (Lyman-&agr; and 10.7 cm flux) and global total ozone as determined from Nimbus observation for the period April-December 1970 (IRIS observations), and April 1970 - April 1972 (BUV observations); and between Lyman-&agr; global totzl ozone as observed at ground stations and the ozone concentration in the lower and middle stratosphere in the subtropics for the period 1969--1972. It is shown that the high correlations discussed in other published studies between these solar parameters and nine months of IRIS data resulted from the use of a very limited, seasonally unfiltered data set.