—_ - A note of special interest is thet some indication of the fireball @ Bise as a function of yield is found in « comparison of the BRT date of the present ebot with that of ME: burns of A \4-8. were produced by exposure a runt fron Meld et trens- mission of 90 pioent per mile.) aX essentially the same distance, much smaller lesions averaging only 1/4 4.4. vere prodused at Japtan by the near SEWIE 02 0a trenesssn). At this disténce the omall difference Sf1/2 mile has a nepligible effect twpon the sise of the image of the fireball upon the retina, Staseered These abutters vere open at sero tine and closed in pairs at intervals inereasing by 10 msec through 100 msec. The remainder of this series, alac open at sero time, elosed in pairs at 120, 250, end 1000 apee. The exact - tine of elosing vill be determined at o lctar date from evaluation of the high speed photography sccumplished during the flesh interval. Thy tise for the sdaimm following the first pulse is ealeulated et It is of interest that 4 of 15 rebbite reesived burne during this period. In fect, 2 animals appear to hev« sustained retina) damage as early as the firet 10 asec of the flash, burning during the At comperehle distances the ineidenee of first pulse oeas mii. about 25 pareeet for both shots. All of the Lesions fromthe first wave of the power pulse vere atid end small, ranging from pin~point to about 1/3 d.d. in sise, Mo burns vere produced bebind shutters open in the range between 0 to 6 and 0 to 250 maec except in one case at the latter limit where « emal) double burn oceurred. . sd This apparent inconsistency in the date is unexplained at the mest. BEST AVAILABLE COPY - 29 - = : aoe NOE cp oeatah RS Lg ge