Eighth Supplement to Dana’s Mineralogy. 367 
Centre [p. 312].—Ramr g (Pogg., cvii, 682) has published several analyses 
of this species. the » mean +3 the results gives— 
Si Ce La, b a Fe if 
eel 64°55 a 28 i 36 is b= — 
ceri 
upon by a 
CINNABAR ¥o 48, II, IV, V].—Hugo Miiller has oie and described tetrahe- 
dral crystals of seebat from As turia, Spain, whic gi ae 5 oy to be ee 
morphs of either tetrahedrite or chalcopyrite. —Quar, Jour. Chem, Soe., xi, 2 
utorire [p. 294, IV, V].—For analyses of a chlorite-like substance from i 
weer porniry é Ilfeld by Streng, see Zeitschrift d. deutschen geolog. 
Beis [p. 309, II].—P. Herter gives analyses of two varieties of chryso- 
olla from the eytalln slates of Ober and N. agg ip pris. atte in 
Gesellschaft, ix, 3 in the er men- 
ws It i ode of quartz. 
or — pis a to liv and a gv 
Ca 216, Mg 0-56, £10 21, H 8" o8= wi pees specimen gave bit 16 per eile 
der, Showi the, iable. In matrass gives water. Aes 
soot the forceps coloring the flame emerald green, with soda on c charcoal gi 
etallic bead, e centre of several of the masses "was found to contain hater 
iit, of which the ‘evs substance is a product of decomposition 
CLAYITE, W. J. Taylor (Proc. Acad. Nat. Sci., Philad., Nov. 1859.).—This 
mineral is a sulphid of lead, with about twenty-five per r cent of arsenic, copper and 
antimony, and appears to be interm ediary between galena an Saath lum bite. od 
18 from Peru, and occurs in See epee is ery, 8 a combination of the tet 
do It is also found 
8 
mn 
4 
o 
ag 
° 
i=) 
He 
wn 
Gs 
ro) 
oe 
° 
ve 
® 
< 
Ey 
a 
® 
cond o an ip } i e 
gray; sectile; hardness about 2°5. B.B. on charcoal fuses easily, giving re 
lead, arsenic and anti imony, and with soda a brilliant ae aisvle which be ae 
comes lustreless on cooling. oe efully selected crystals 
8 $ Pb ie Ag 
1, 8-22 one 654 68°51 or 
2. 814 ani 67°40 5°62 a : 
Was not entirely free from é eous en Pic ip aed gives the form- 
as Gay, As 8b), “A confirmatory re tained on a specimen of the 
suerPhous vari mi 
containing meet twenty or more per 
and zine, although this com mperition varies exceedingly.— 
em., Lxxvili, 
at [p. 26, II, IV, VI].—O. Matter has analyzed (Jour. f.prabt Ch 
m4 Sie. 0 so-called Bog- hea ‘coal rae ha ee wal te tland, with the e following 
FE Be Oa 
eabe 1-22 027 ==100°05 
Coxpurerre tion of this mineral by C. Mapa cmb 3 
» HL. Zeit, Tait, vik 208 383) cafirms the restl the nie cegelriers ry y. Kobell and Ra 
err i: N....0.-8 6 oe 
80°81 918 078 4:39 0°32 O80: 13°19 
