Er, Lauren R, Donaldson « 3, May 16, 1956 The external gama dose rates should be taken in the same manner as reported in W113, It would te helpful if on each and every date sheeb were ineInded the dates ef collection ani of analysis, Also, when plotting on log-log paper, it would be advantageous it use cycles en the two coordinates that were of equal physical length, and thus facilitate a quick estimabion of decay curves,