Ninth Supplement to Dana’s Mineralogy. 359 
black, brilliant black on the surfaces of perfect cleavage; lustre, on ‘i vage surface 
— on cross fracture waxy; streak, greenish gray. Analysis of a specimen 
Leeds: 
Si Al Fe Mn Mg H 
26°30 87:10 25°92 0:93 3°66 6°10=100'01 
This variety of oy hoge: - —_ know ong geologists and mineralogists as 
phyllite, and ao. unt shows in his artic le a subject (given in this number of 
Journal) th fi i ro 
oe al. He r sugge 3 
variety of chlorotoid, although this latter suggestion — — — 
The abundance of chlo rotoid in the schists occurring o reas in Can 
and a Grads Mountain range, has led Hunt to name * sini te "ohlorotoid date 
E [p. 184, I—IV, VI].—Mr. Edw ait A. Manice, of the Yale econ 
Scho, prs amnyzed the olivine Fe by Prof. O. P. Hu bbard in a boulder 
oarse basalt at T hetford, Vermont, with the folcwg result: 
Fe Mg 
40° "5 9°36 50°28 = 100°36 
The oxygen of 3 silica, iron and magnesia is 21°73 : 2°08 : 20°11 or Si: B as 21-73: 
22:19, so 1:1 or (Mg, Fe)38i. 
Grains of green pekeyestite washed from voleanic-sand found on the sea-shore near 
Veuuvins, are ed by Kalle in Rammelsbe Heh ong ry (Pogg. Ann., cix, rae 
e 
contained Si 40°36, hs 46°70, Fe 12°34—=99'3 his gives the formula Fe*Si+ 
TMg*Si ae een very nearly » with the Socspmiiin of the beaver” a the 
Palias eidtene nev) 
of Mt. Som an 6 cecurs in erystals. Sp. gr.=3°243. The pa nase ‘oil 
ae pert she be fiiculty, pk trac dt acid. §i 42-41, Mg 53°30, Fe 2:33= 
“Od. cal be a mposition of boltonite as ceed by Smith 
upp I) ay the pari (Supp VID. 
«, CHINOCHLORE in? anne i i, = a ap of clinochlore from Achmatowsk by 
ruve (Kol in, Russla , in Kenngott’s Uebersicht, 1859, 54): 
ee 6: th ~ Me or ee H 
81°64 13:54 5°83 36°20 0°05 12°74 
8152 13:96 612 35°68 0:05 12: 
6 
agreeing very closely with the analyses by Craw and v. Kobell of the American 
and Bavarian mineral. 
PPER p. i shes , VI].—Hautefeuille has discovered the presence of mercury in 
& Specimen o ntiferous ne from Lake Superior.—(Compt. Rend., xiii, 160, 
Kenngott, Uaheraehe 1859, 1 
in Bohem ineral is jet-black; opaque; streak dark t “i ners afer 
hetie a ree po | mineral is ea oe 3. 
fuses to a black magnetic mass and wit h fluxes gives reactions for iron can iia 
8 gi 
hese, Dissolves i in acids, and on caporation yields gelatinous silica. Composition: 
‘in 
. Be “4 
29-08 ée 52 101 4:02 9°76 
Bi 
21° 
[A cece of the ri See of iron in this mineral = v. Kobell gave 
5°35 on which he recalculated one of gas s analyses (see Min.). We a 
nother anal, ae me eo mann ehh = here cesquiay adres i, Sag (Schweig. 
=100-78. 
mour gives the pit fie it, ro Bests, ln, or Mg Poeiish ery 
Qi ss Whitneyite. 
Davyyz.—See Nepheline. 
Au. Jour. Sc—Sgeconp Series, Vou. XXXI, No. 93.—May, 1861. 
ae 
