An Unexplorable French Pit

The vro nderful pit of Creus de Souci ia Framee is situated in a sheet of recent basalt om the south side of the Puy de Hoirtchad .. The opening is 83 feet in diameter .' md 38 feet deep, but at that foptb. ■.' hole abont 10 feet wide communicateK with a bollow 70 f pet deep, at tie'b'oït) Dm of which is a sïagaant pool varliaáe n with carbonic acid, which for)ids ac ;ess to the water surf ace. The uterior is a vast hollow. apparentlj fiormed i in the basa'tt when semifluid, by an expïo ion of vol canic gas. The tem eratuM falls frora 5-1 degrees Fahren ïeit in the open lir to 34 degrees nea the wí)