In ouv test, wa Know that 50 parts to a million was way too much, Five parts por million was way teo rmech, Tas stvonzest w2 used was half a part per million, and this is the result that wa get, and dichromate runs for months at a tins ata half a part por million, and theso are tho mortality figursos which wo gat. The esas -- fina -- practicality no nortality even at this level (indicatinz). During the fry stage, we see mortality and during the finzyerlinzg stases this mortality increases. This is in torms of mortality (indicating); a slowing of the growth rate is even more spoctacular, and we sea again the control. Almost all of these are slightly less. . should be four. The two and the four, This these ave not statistically significant, but from the .05 on down, it is statistically sisgnificant in terms of a slower growth rate, So, wo find out that we are -- and in terms of a conventional types of toxicant -- wehave a factor of probably one one-thousandth of tho assumed toxicity of a conventional type of chemical. This brings up a point where I am not Suro that we know enough about radioactivity, and its effects, as we do avout soma of the old chemicals that have bean around for a geod many years in terms of these chronic studies. - With respect to temperature, the species with waich we are most concerned are the salmon. We know that we can put carp ox something of this sort in the straight efflucat at very high temperatures, and they get along very fine. Ye also linew van.