4 - a2 ¢ af ". @.: t : ~. oe — bove : caut2 ae . . et. b i an geek Se ee OY * _* of = Ly a . 7 -97 Fa Sj = 4 asy . “t SUMMARY OF OPERATIONS ON CONTRACT NO. W~28-094~eng-33 4 “1572 . ; * . POR TRE MONTH OF SEPTEMBER 1948, Project I# Basic studies on the effect of X-rays upon fish in various stages of development. Sections T# and [I#. The data summarising the effect of exposure to 100 r units of I-rays on the r, “generation final report forn. of chincek salmon fingeriings 4s nearing the These data willbring up to date the results of the experiment that startad in the fall of 1943 with the exposure of adult chinook salmon to X-rays prior to their spawning. Project VI * Exposure of marine invertebrates to i-rays. Marine snails, Thais lamellosa, exposed to X-rays on July 7, 1948 Date: observation. ped t A "ae blic cl By: el Enterectin OpenNat By: PENNET ENT sfReisase tersDas i] av with whole body single doses of from 5900 r to 20,000 r conbime under |i3 i The marine snails in this experiment, alive on Jaly 31, survived é 3 Q - 0 the end of September. The failure of axposures to I-rays from the 5900 r ~- 10,000 r range to cause mortality in excess to the controls | suggests that the snails are tolerant of X-rays in the range used. Re~- peat experiments using higher doses are needad to cetermine the L.D.-50 DEPARTMENT OF ENERGY DECLASSHFICATION REVIEW Tangs Project X. SINGLE REVIEW AUTHORIZED BY: soe r Bikini Resurvey of 1948. REVIEWER (ADD): NAME? CATE: LLfT Of the 2500 ashed samples bYrDURNt~to~tre”Appr: DETERMINATION (CIRCLE NUMBER(S)| 1. CLASSIFICATION RAINED CLASSIFICATION CHANGED TO: “CONTAINS NO DOE CLASSIFIED INFO COORDINATE WITH: BNELASSIFICATION CANCELLED 6. CLASSIHED INFOQ BRACKETED 7. OTHER (SPECIFY): > 8 from this summer's field work, 600 were counted during August and the balance during September, In addition approximately 400 samples were neers’ and section numbers refer to the Projact Chronology Chart and Summary UNFL-9, revised March ll, 194. DOSARCHIVES