214
J . A. KITCHING AND F. J. EBLING
4 5 6 7 8 9 1 0 I1 12 13 14 IS 16 17 18 19 2 0 21 2 2 2 3 24 I 2 3 4
60NITF'S ROCK ,
High Slack
Low Slack
High Slack
low Slack
Water
Water
Water
Water
TIME IN HOURS
FIQ. 12. Oxygen saturation by Winkler's method at five stations off the west bank of the
Rapids, 7-8 July 1949. 0 , surface; 0 . bottom.