18 timately one-half that found in bird muscle Appendix Table VIII. Planicton a ~ . ‘The Rongelap plankton eollection‘consists ‘of a eingle tow on Hareh 26, 2 paired vows on guly 16, December & and December 18, 195, and four paired tous January 26=30, 1955. A‘Michael ‘Sars type net, h~meterin‘Glaneter and with either #6 or £20 silk “mesh wasused, ‘howey | ‘Tows, were taken at the surface duringdaylight Sos re | pe ae “Radioactivity of‘the‘Rongelap ‘plankton samples waa more ‘than’one“hundred ‘tines‘greater than that of planktonsamples “gollected fron the‘open ogean waters of the WeateraPacific: “with the vscae"taney" dubing ‘operation roll, on the eruise of the "naney”“during March and Apeil,1955, 85Blanicton “samples were‘taleen along theroute from Kwajalein to the ; ‘Philippines ‘to Japan. he average activity of these samples “was: 018 * 10°“3 ue/gram of wet sample, the higheat values deing 050 x 10“3 wef. Por‘the etghtJamuary 1995 Rongelap “plankton sauples the average value was 2.Q:x Ww* ue/esthe “lowest value being O a ue/e. | | 7 - Other eonelusions froa the Rongelap plankton samples are (a) chat the radioactivity perunit weight is greater than for . “most other biological samples,(a) the decay rate ts einiler ‘to ‘that for ‘the soll sample, and‘@) there is considerable vartation tn+ the®radioactivityofsamptes|from a paired |tows.“ aad ��4 ate ree atineaMewr eterHarrnena oneEEN