CJJ 68-1 Carol J. James Devil's Hole, DVNM, Ash Meadows, Nye Co., Nevada. 11 January 1968 0930 - 1135 hrs. C. James, C.W. Dry, M. Armstrong Initial Observations - Weather - clear sky except for some slate clouds at horizon. No wind to gentle wind. General Condition - No pictures of shelf possible because of scum. Rocked barrier - "grey" matter is now almost white. Fish still picking at it. Scum - Heavy. Broken + small flakes but w light scum in between flakes - giving (from a distance) the shelf a greenish tint as if the algae were growing back. (see M. Armstrong note - Schoolhouse has luxuriant algae a chara). Scum over upper shelf area shifting. 0930 hrs. - O2 taken (Winkler) - 4.0 ppm Water level - 1.75 on USGS meter 1000 hrs. - Light (no direct sun - sunlight half- way down upper wall) Incidence - 11.9 Reflected - 6.7