M.Thury found the cold due to evaporation to be considerably less than 1 deg.

F.,[78] and he and M.
Morin both fixed the general temperature of the cave at 36 deg..5; they also found a current of air entering by a fissure in the lowest part of the cave, but it did not disturb the whole of the interior, for in one part the air was in perfect equilibrium.

M.Gampert,[79] in the summer of 1823, found a strong and very cold current of air descending by this fissure, along with water which ran from it over the ice; he believed that this was refrigerated by evaporation, in passing through the thickness of the moist rock.
Two peasants visited this cave three times in the winter season, viz.

on October 22, November 26, and on Christmas Day; and one of them, by name Chavan, drew up an account of their experiences, which was read by M.
Colladon before the _Societe de Physique et d'Histoire Nat.

de Geneve_ in 1824.[80] The peasants found very little ice in columns at the time of the October visit, and there were signs of commencing thaw.