The northernmost of these (43 is the most active, the steam issuing with force enough to throw out pebbles an inch in diameter when cast into the vent. Two temperature ob- servations here one at six inches and the other at nine inches below the orifice gave the same results, viz 99.5° C. (conec- collected gas for analysis. tion OK?) The second ^12 or 15 feet vent, some ten or twelve south of the preceding, gave forth a gentle column of vapor and its temperature 18 inches below the bottom of its little crater was 95° C. (21,52 B) The third vent, about ten feet ^still further south, discharged so