= = ge 
70 Scheerer on Isomorphism. 
The analysis a a.loss of 2°24. The pitchstone 
was from the Trieb: pec hthale near Meissen. The same mineral 
y 
was examined also by Erdmann; the oxygen ratio — 
him was ca $5-79: 4:55, but this analysis gave an ez- 
ess of 3948, e stone appears indeed worthy of ‘tern name !* 
Ox moreover mined a pitchstone from Newry, whose oxy- 
oe nee = : 4-26, and the analysis of which in- 
Ty titiog loss only—not above 0-2 per cent. The 
above tae therefore cannot well be very far from the truth. 
' 2. Crmolite. Sr geet 
82.735 IIR PSO F oe ; 
33-00 : 11:00 : 3.06 $ —(R) Si+Al Sit. 
“This is the formula of soda-spodumene. In cimolite however, 
®) consists only of water. 
3. Onkosine, (v. Kobell.) 
ayn + TOME EEO) 
28-00 : 14:00 : 4-66 ; (R) Si+Al si, 
the formula of labradorite and ryacolite. (R) = 6:38 K, 3-82 Mg, 
080 Fe, + 60. The analysis showed a loss of 1 per cent. 
4. Pipestone. (Catlinite, Jackson.) 
29-15 : 10-22 : 5-23 oe Uaiee 
, 30:00 : 10-00 : 5-00 ; 3) Si R*'Si°. 
(R) = 1248's, 2-16 Ca, 0-20 Mg, and 4-58 . 
or? 5. Fettbol, (Kersten. ) 
S411: 86177962 ee 
“94-00 : 8-00 : 8:00 § (R)? Sit +R Si. 
The analysis gave a loss of 2°59. (R) == 24:50. The for- 
hylite 
mula-is that of ta 
Ne Shvthise (Thomson. ) 
—_ 2500 $1500 500% (BR)? Si? 43.41 Si. 
=, ‘ i 
(R) =8-046a, 432 Me, 1-72Mg, 4163, Loss, 2-04, 
7. Agalmatolite. — a 
2566: RET cay Bir 
here is an uitteenalatente play upon the word te pech” here. 1 regret being 
ema en to sender | ines E to Eogisty 2 asa joke 45 German, from its extreme arity, al- 
a lg 
