055 67-20 Carol J. James Devil's Hole, DVNM, Ash Meadows, Nye Co., Nevada. 23 Dec. 1967 0830 - 10/10 hr. C. James & C.W. Loy Initial Observations: Weather - Clear sky. Nowind - very slight freeze occasionally. Air so cold - steam off water. Small snow patch near D.H. Snow on No - facing slopes of surrounding mountains. General condition - Essentially no algae on rocks; 5 or 6 small (largest = ~ 5x6") very dark green patches of algae on shelf. 0830 - O2 taken - Winkler - 5.3 ppm Air Temp. - 6.6°C Water Temp. - (at rock) - 33.2°C Water level. - 1.75 Light incident - 11.4 no direct reflected - 5.9 light Count 70 fish - est. 100-110 fish on upper shelf. Rocks very dark so, hard to see fish. about 80% of these are adults - rest are juveniles - Some fairly small juveniles seen, but no young. Most activity is in southern half of shelf. Scum - very scattered and only over approx. area of the upper shelf.