’ om 360 Shutters e These shutters vere closed at nero time but subsequently were opened for a pre-selected tine interval during the pover pulse. sustained burns in this series, Four of 16 rabbits The interval of 10 to 250 meet produced a lesion in 1 of 2 animals exposed. In 2 of 2 rabbdita the increment of 1C to 1000 msec produced burns essentially the seme size ani severity as those obeerved in the BRT study. ‘The interval of 500 to 600 mace eaused a smell mild bure in 1 of 2 animals. Although this animal wes atpoeed only about one-third of his blink reflex time, the dose rate was near the maxim f this ebot, The tine of the maximm ie.saleulated at about . _ Bo burne vere produeed after the first senond of the flesh, Destroaic Bo turns were sustained by the 2 rebbite exposed behind these shutters. Dafortumatealy the sleetroaic recording syatem for these deviecs was inoperative at the time of the shot. The results of this portion of the study are inocsc]usive. Protective Qaly 2 dures vere produced in 27? exposures behind ‘be fixed density optional filters. moderate severity. These lesions were both 1/2 4.4. im size and vere of Unsexplainably, neither burn was produced behind the least protective filters, LEST Te RLiak reflex tine for man enti animale ie pot Feat enough Sosprovect egainat the flash from ap atomic detonation om the order Paid, An air burst of thie sise on a clear day (90 percent tranemiesion/aile) is sufficient e @ lerge chorioretinal burns in redtite and monkeys st acd in non ot Addi‘ional deta are open needed in order tc esta) By" lipiting distance for burns « BEST AVAILABLE C sae Tyot oO om gence BS .