"little steam and this was so [144] enurable by the bare hands that its temperature was not taken. Proceeding southward there are no other fumaroles in the Grande Fente until the south side of the cone is reached. There about 50 yards below the top of the cone one finds the Cratere du Sud. The actual orifice of this fumarole is in the bottom of the narrow open fissure which the Fente here presents. It is wholly inaccessible ble and is not very active. Warm vapors rises gently from the fissure and no hissing noise could be heard. We did undertake to sound the depth of the cleft with a stone tied