228 Scientific Intelligence. 
Il GEoLocy anp Natura History. 
1. Cotemporaneous formation, in the thermal waters at Bour- 
bonne-les-Bains, of different Mineral Species. —M. Davsrée, 
C. R. Feb. and March, 1875, t. lxxx) describes the following min- 
erals as of recent formation from these thermal waters: tetrahedrite 
( antimonial copper), chalcopyrite (copper pyrites), bornite 
(variegated copper or phillipsite), chaleocite (sulphide of copper), 
pyrite, galenite, anglesite, calcite and chabazite. By pumping, the 
bottom of an old well, at Bourbonne-les-Bains, called the Roman 
well, was laid bare. The material was a black argillaceous 
earth containing bits of wood, nuts, etc., and then, at a lower level, 
The temperature of the waters is near 60° C. The substances 
the waters hold in solution are chiefly chlorides and sulphates of 
the alkalies, and of lime and magnesia, as well as bromides an 
carbonates of iron and lime, an alkaline silicate, and traces of 
arsenic and manganese, with no sulphides. The total weight of 
the residue on evaporation is 7 to 8 grams per litre. Daubrée ob- 
serves that the sulphides would have been formed through ~~ a 
markable, as he says, that sulphides so unlike should have = 
a 2 same. 
The antimony is referred by him to the coins, some of which 
The chabazite was formed in connection with a cement of frag- 
; sei paca 
t 
are sometimes lined with colorless rhombohedral crystals, nearly 
cubic in form, which have the characters of chabazite. In the 
lime, small crystals occur of a right rectangular form which est 
not yet been determined with certainty, but which resemble muc 
those of lime-harmotome found under similar circumstances at 
Plombiéres. 
Such facts teach us, says Daubrée, how important has been the 
agency of the water imbibed by, or traversing, rocks, in all parts 
