a+ tas Ry(ke? - ke*2") with @ solutdon =, [*ofAy-Ay) tye o*). « (8) as‘a [sAt one] svnen ax Ou ety nt te veto with a solution . Ds aise [= » oAyl2t-ty) al (9) t, “hh ~A,e~,(t-t) -A3a) + Bota [aye rh _ (2a,-ApJe having chosen D =D, D = Oat t = ty. (For long t and small d the constant t, may be set = 0) Substituting the values shosen into equatden (8), there reeults with t = 27 days as in reforence (1) and t, = 0.15 day, 39 = Bf 0.0205 (0.0874) - 9.37 x 107 (9.0 x 10)) 910,0855 R, = 166 pefday per d/nt™ per 10% rtssione, or y(t) = 186(0.0169) = ek r41lay initdallye While Delo , #31 x 10> (0401) + 06668 (0.347) = 209 + 6 = rep. 220 in 27 days 0203 if t, 0 and t, =O, there results & @ 261(1 # 0-0) - 18.4(0 - 0 + 0.383) = 261 + 7 & rem to om. Formulas (7) and (&) may thus be simplified by neglecting the smaller exponential terns, tut letting t = co 6 results in about 20 per cent too Pao. = oy a mem in DO’ ARCHIVES