Ninth Supplement to Dana’s Mineralogy. : ae 
Narrourre [p. 327, VI, VII].—I have analyzed the natrolite oe found “i 
ae rn New Jersey, in the greenstone taken fi rom. - tunnel constructed by th 
ew York and Erie Rai Road Company. on 
& Ca 
H 
G= 2-249 47° 31 26°77 0°41 1544 0°35 98410012 
showing it to be a Abe — natrolite and not thomsonite as has been supposed by 
NEPHELINE (i 089, 2 Th VII} —The so-called davyne of Monticelli — pedis: 
i d in the mineralogy under nepheline, has recently been pra b mels- 
ogg. Ann., cix, 579). née results obtained show dav oer ‘hon 
nepheline only in containing carbonate of lime. The crystalline pt iba cleavage 
s 
K H 6 
l. 8876 = 28-10 932 8©=—-15-72 1-10 196 = B63 = 99°59 
2. 8681 2866 10°33 15°85 1a — 6-01 
; 9°39 
If the carbonic acid and an equivalent eee of ‘hive be subtracted i in (1) we have 
Bi 45-41, Al 32-92, Ga 1-97, Na 18-41, This is nepheline, and davyne may 
be regarded a s aco mpound of carbonate of lime with nepheline, anew to the 
a 
mp: nD f cancrinite as nD . Rose. _Cancrinite differ davyne in 
that the amount of lime it contains is not sufficient to saturate the carbonic acid, and 
& portion of the carbonic aci us sumed ith soda, If these 
two minerals ained carbonic acid combined only with lime, and that in an inva- 
riable peg Ai it could be assum s nepheline and carbonate of lime erys- 
tallize in the A big that they might possibly be isomorphous mixtures, But 
Rammelsberg r ries sie s that the varying amounts of lime and water (in some specs. 
pr. ct.), m {tthe rational ey diepai der ee minerals as nepheline to a 
certain seer sdedeeh by the introduction = carbonate of lime—an analogous de- 
composition being found in the scapolite group. 
apolit 
Pecrotire [p. hag 4 in III, v—Vul] .—Inglestrém has found egg at ane, 
bans Iron-Mine in and, associated with chl and calcit 
resembles asbestos. “BB . give 3 - water and foes “Ct to a white ers A 
partial Baa gave—(Jour. _— t. Chem. Ixxxi, 396,) 
- Nak wer Mn 
52-94 38°83 8 48 175 3°70 
(a) by the loss. 
Bibra « .—For remarks on the formula of, see Rammelsberg’s article in Pogg. 
MN,, CX, 622 
Pao.ertre [p. 251, VIII].—Mr. Richard Miller of Carlsruhe has communicated 
to Prof Dana he following analysis of the so-called naecrite (Nakrit) recently found 
at the Fin igheit mine in Frei erg, Saxony. occurs as a white, scaly cry 
gate in seams in gneiss and is associated with galena. Composition 
Si 
46°74 39°48 14°06 
Oxyge 24-92 18°45 12:97 
The ratio of Si, Al, H, is as 4:3: : and Miiller ed ee — X13 $i4-6H or 
Al, Si? This is exactly the formula and co appl VE Genth fo: 
the pholerite of Tam maqua, Pa, eit Jour. [2], ‘xxviit, P61, phe ‘Supp vil. Kop 
an analysis P h fiir Min- 
eralogie, 1859, 545. . 
PP esta [p. 426, II, vi-vin|— F. Field describes ae from a 
une near Coquimbo which have a ag ares ‘is bales and consist 
Ca Cl ri 
on $ 
cat Ags 293 8769 36: “64 Ph 2°3 = = 99°91 
_ This he represents by the formula 2(On’, a ioe. )+Ca Cl or 2 atoms 
___ phosphocalcite, 10 ous of tribasic phosphate of lime, and 1 atom of chlorid of cal- 
