256 
as water. Some may remain two to three times 
longer depending on the kind of washout mecha- 
nism. I would say with a residence time of 10, or 
20, or 30 days it can go once or twice around the 
world and even in the center of the Pacific you 
will get quite a bit of contamination from the 
continents. 
Dr. A. Goetz—The analyses were all for sul- 
fur only, not for sulfate? 
Dr. Lodge—The samples were analyzed for 
sulfate, but it was computed as sulfur, the 
way the Swedish group reports it. 
Dr. Goetz—The industrial SO, would require 
DISCUSSION 
a fairly long time before it is converted into sul- 
fate, whereas the ocean could probably only 
yield sulfate. 
Dr. Lodge—A substantial percentage of these 
data were obtained from filter samples, and were 
not oxidized during the treatment; this would 
be sulfate. I am a little less certain of the 
Swedish data, which may include some SO. . 
Dr. A. H. Woodcock—Since it is fairly well 
established that chloride varies with the wind 
force over the sea, it would be interesting to 
know whether or not sulfur is also related to 
wind force. 
