456 S. B. Christy— Genesis of Cinnabar Deposits. 
appear to belong to the same formation; but it would require 
a thorough examination of all of this series of mines to trace 
out this and other interesting questions. have dwelt thus 
long upon some of the characteristics of this mine ce it is 
in many respects typical. 
Von Cotta in his Frz-lager Stéitte, vol. ii, p. 616, gives the fol- 
oe as the characteristics of the principal cinnabar mines of 
Rhenish Bavaria, Bohemia, Alps, Upper Italy and Spain 
Country Rocks :—Sandsto one, clay-schists, trachyte, taleoed 
mica slate, limestone and quartzose mica slate. 
re matter. ae Baca blende, galena, tetrahedrite, limonite, 
amalgam, copper pyrites, iron pyrites, silver ores, native quick- 
silver, horn quicksilver, idrialite, lebererz, magnetic iron pyrites. 
ein ett — Quartz, aera heavy spar, cale spar, 
gah iy Curemicat PRopERTIES OF SOME OF THE SALTS 
oF MeErcury. 
The i ora here becomes at once limited within very nar- 
row boundari 
e stable arf of mercury which could exist in any natural 
mineral waters are very few. e mercuric chloride is at first 
sight the most probable one, the sulphate not existing in solu- 
tion except in the presence of a free acid. Still, salts of mer- 
cury have been proved to exist in at least one e mineral water. 
In the analysis of the spring “du Rocher,”t there is given as a 
constituent of the water a small amount of mercury. It was 
very small; the total amount of all the heavy metals, includ- 
Ing m ercury, esti estimated together was only 0-008 grams per liter. 
But the author states that he obtained enough mercury from 
500 liters to exhibit it in the metallic eoceaen 
* For another description « of this and other deposits in Califo ornia, etc. ete., with 
other interesting facts, see “ Les Gisements ds Meerdabe 00: Odltfenria? par M. G. 
Hollend,” Annales des Mines, 1878, and also “Bulletin de la Société Minéralogique 
ah te ON ee of Almaden in Spain, see the article of 
on 0 
Mr. Goll shove ited. yo . 10-49, oe trandhabbale 204 tse series 6-19-20. 
Pea _ Nesiirelesbaut, Puy Puy-de-Dome, by M. Garigon, Comptes Rendus, vol. 
