Elkaddtman 1955 Buffo carnuz Aug. 9 Triga Baras study area. Bob Magell of Radiation Safety Lab at Berkeley brought me a new way sensitive scintillator (Corodin Aviation Cogniton) for trial on food recovery. We surveyed the study area beginning just NE of Ranger Station at 2:15 8.m. Light breeze, cool day, air temp. in 70's F. Foods active on surface. Three tagged animals recovered but none while underground. An animal on the surface could be detected for some 10 feet away with about 200-300 c.p.s. registered. Background was near 50 c.p.s. Bob covered the ground in an irregular manner, searching likely gazella were first. Temp. data on T-42 (RF - LF 2+4 RH _LH_) 2:30 8.m. Clouds 29.90 C. Air 23.80 C. Boulders shaded. Substrate just under surface 31.00 C. Animal had been digging about on dry-appearing grass surface. Slit on rock headed shut. The lead toilet headed left upper femoral position {6} but still slide freely beneath skin. Bob {11} got "slides" to 300 c.p.s. over a lone meadow mouse. I dug out a pocket gazella run which ran downward to 7 inches below meadow surface and along a granite boulder. I was unable to smooth the rock while probably was 2 feet in depth at least and measured 14x 20" across the top. Burrow probably too narrow (<1 1/2" some places) for a food. We excluded the boulder radioactive. This could be a real But did not test "hot" Oct. 22.