~ 24 autopsy data may show significant bias due to the selection process in obtaining permission for autopsies. Page 13, lines 2-6 - "Based on evidence reviewed above it appears that atherosclerosis is a cancer of the artery wall and thus that coronary heart disease and other diseases of the cardiovascular and renal system are expected effects of inhaled plutonium and of other insoluble alpha emitting particles." Comments: This sweeping generalization and string of presumptions are poorly founded, for reasons given already in previous comments above. Page 13, lines 6-8 - "An adequate assessment of the magnitude of these risks can only be obtained by a comprehensive medical followup of all past and present plutonium workers." Comments: We do, however, fully agree with the author that there is need for a proper epidemiologic study of workers with plutonium burdens, and ERDA is now developing concrete plans for such a study. The continuation of such studies as well as thepertinent experimental research are certainly worthy of support and encouragement. Page 13, lines 8-12 - "Until the age distribution of these effects among plutonium workers is fully assessed, any claim by the proponents of nuclear energy that there is little risk associated with the MPLB (maximum permissible lung burden), 16 nCi of plutoniu, or fraction thereof, is totally unjustified." Comments: The use of the phrase "these effects among plutonium workers", “ee without specification, suggests that the author has already concluded or presumed, on the basis of "the limited published information" (his term on his page 12), that all of the deaths, causes of death, and he diseases among plutonium workers that/mentions on his pages 12 and 13 or other specific are “effects” of plutonium rather than natural/causes, despite statements he attributes to the investigators of "the medical experience of 26 plutonium workers at Los Alamos 6 #9150)m to the effect that "none of