P. 65. Now called Annales des Mines.

[188]

T. xlv. p. 160

[189]

Bibliothèque Universelle de Genève, Première Série, t. xx.

[190]

See De Saussure's account of his numerous observations of such caves in the Voyage dans les Alpes, sections 1404-1415.

[191]

P. 271.

[192]