program have been received, and no Sr-90 data will be te te SeHheph onee ere Not all of the 1956 samples fox the HASL pasture ea se PASTURE PROGRAM -reported until all analyses are complete. There have been several improvements in analytical techniques since the 1953 and 195i pasture samples were run originally. Therefore, all samples still available will be reanalyzed in the coming months. When complete, the four years data will be reported as a unit. state of Sr-90 in the biological cycle is through measure- . ment of stable strontium and calcium. Some of the original FE poiore OH One approach to estimating the eventual equilibrium pasture samples have been run for stable strontium and are reperted in preliminary form in Table 5. No attempt at interpretation will be made until further enalyses are 18 Pton (Ses also section on milk enalyses.) ~2O - leae eS ie gE oy completed.