226 . DASA 2019-2 and biologists of various kinds but we never did get to see the physi- cians, This is very interesting. But, out of that conference we saw some Japanese data, from their Shunkotsu Maru expedition, which I think was right in the middle of the test, wasn't it, Lauren? DONALDSON: EISENBUD: expedition? Yes. Do you remember the date of the Shunkotsu Maru DONALDSON: They left May 24th. EISENBUD: They sailed into the equatorial current just west of Bikini and took profile measurements which indicated that about 200,000 curics a day were drifting out of the lagoon into the equatorial current. This is while the other tests were going on. This informa- tion was given to me ina little packet, It wasn't discussed very much, I read it on the way back and I got interested init. Asa result of that and the fact that it was a simple extrapolation to show that this would go into the Kuroshiro Current in the Philippines and then heaa north to the Japanese coast, it seemed prudent to get out and get some measurements, This was done through an operation control which was carried on jointly between the Coast Guard and Dr. Donaldson's laboratory and ours, and that took place, I believe, in March, about a year after the 1954 event, DONALDSON: This expedition left on February 25, 1955. EISENBUD: And got some very good data on the distribution of radioactivity in the Western Pacific as a result of that test. FREMONT-SMITH: Was it appreciable? EISENBUD: Yes. The radioactivity was detected everywhere that the expedition went. It started essentially from the Marshall Islands and proceeded west to Guam and then north in the Kuroshiro Current to Japan, where they put in and exchanged data with the Japanese. Then, as‘ recall, Lauren you correct me—I'm just reconstructing this—they came back in the Alaska Current and went down the West Coast of the United States and completed a cruise of some three and a half or four months during which time they actually followed the current all the way around.