92 KREY AND FRIED } | A | | | | | al 1 i i —_ ty ib = gil wil — I, n ~FlI ~ = 7 a 1 aN bint t t i ftoa ON NGS rt vt 10,000 -— le — = — — ! | | ' fot / = RELATIVE ACTIVITY _| oa 5000 K+ je — 1 ! —_— t 4 \ A ‘/ = — \ \ \ —4 { \ Noe? Oy bese \ — \ \ a ,/4\ an | \ Nn 1000 Fe — — _ o—— | — 500 — — = | —— SEDAN AIR-FILTER SAMPLE No. 112 = a \ ~=-- SMALL BOY AIR-FILTER SAMPLE No. 545 ‘ \ \ 100 L_! 0.14 pot 0.54 tp 0.94 1.34 ENERGY, MEV 1.74 _l 2.14 Fig. 9—Comparison of Sedan and Small Boy gamma specira. —