Mineralogy and Geology. :” 
had sulphate of magnesia. The analysis of the mineral is, according 
to Dr. J. L. Smith, and also the researches in my laboratory : 
H Si Al Mg K 
Jed. Smith, 2066 45°66 487 2-09 3:07... 22°10 0°15==98°45 
E. Reakirt, 19°96 44°07 4°72 170* 3°75 21:49 not det. 
| scrapers jee! a 
ry Keyser, 44-66 179 26°60 O12 016 
According to these analyses the mineral is Saponite.” 
3. A new Meteorite from Tennessee ; by Prof. J. Lawrence Suits, 
(from a letter to J. D. Dana.)—The meteoric iron was found in East 
Tennessee a short while ago, and weighed originally over 60 Ibs. It is 
a highly interesting one, and has furnished for the first time the solid 
protochlorid of iron, found in a fissure. It is also rich in the phosphu- 
ret of iron and nickel, and furnishes material for a full investigation of 
this latter mineral. The examination is nearly complete, and when 
ysis of Owenite accords with Dr. Genth’s; that of Thuringite shows, 
that in the former analysis of it, sixteen per ct. of alumina has been 
overlooked. Full details of these particulars will appear in the fourth 
part of the reéxamination of American minerals. 
5. On the probable depth of the Ocean of the European Chalk De- 
posits; by Prof. Rocers, (Proc. Bost. Soc. Nat. Hist., 1853, 
97.)— Various geologists, and among them Prof. Ed. For 
excellent and learned Paleontology of the British Isles in Johnston’s 
Physical Atlas, have suggested that the Ocean of the Chalk deposits of 
urope was a deep one ; and in evidence of this, Prof. Forbes cites 
the « striking relationship existing to deep-sea forms of the English 
Chalk Corals and Brachiopods, adding that the peculiar Echinoderms, 
(Holaster, Galerites, Ananc ytes, Cidaris, Brissus, and Goniaster) favor 
this notion, as also the presence of numerous Foraminifera. 
fossil test to the age of the Green Sand and Chalk of Europe. And 
his American stratum was unquestionably the sediment of quite shal- 
low littoral waters. That they must have 
the present deposits with a deep sea, would have likewise overspread 
the low Gneissic hills to the N. W. of the Delaware, which present no 
traces of having ever been submerged during the cretaceous or any 
Secondary period, = ee 
; . The piesauionyd of iron and alumina contain a trace. of silica, which was not 
eparate 1 i aaa : 
Le, Fe 
