Reise im Russischen Reich, i. 359; St. Petersburg, 1772.

[158]

xxxviii. 231 (an. 1791), in an article called Notice minéral, de la Daourie

[159]

L.c., p. 236.

[160]

Beobachtungen, &c., 194.

[161]

Mundus Subterraneus, i. 220 (i. 239, in the edition of 1678).

[162]