and the Products of its Transmutation. 129 
‘Lime, . im aiigrO? 
Maonesia, ; : 0°49 ’ “ 
‘ Potash, : sb ALE Hag hie 
Soda, . } . . 0°63 
_ This mineral agreed perfectly in all its physical characters 
with that mentioned by Brooke and analysed by Thomson, 
who found that it contained protoxide san iron, and, unlike the 
generality of scapolite, no soda. | 
6. Nuttalite from Bolton. © Physical: character like the 
former. Density 2°788. When heated they gave out the 
same ‘emmpas smell as the Arendal scapolite. Analysis 
gave :— 
F ¥, i. ye 
Silica, . d . 44:40 “Athi 44°40 
Alumina, 29-50 25:28 25°52 
Peroxide of Iron, 3°79 3°79 
Lime, . : ram 8) a56 20°48 20°18 
Magnesia, . JOOS 1-08 1:01 
Potash, . : rn ad > 0.51 0-51 
« Soda, . : : e 2°09 2°09 
Water, .. ; 2 oe ty ugk oe 1:24 
98°74 
The quantities of oxygen are :— 
Silica, . : Pe gba fe. 22°04 4 
Alumina, ; yi Lis 
Peroxide of Iron, . 1.11 } ed Be oN 
Lime, . ; . 6°74 
Magnesia, . . 0:40 
Potash, ; J 3 @09 G06 a 
Soda, . : . 0:53 
7. Prismatic Scapolite from Arendal.—Occurs in the 
_ magnetite beds of Arendal, together with the compact sca- 
| polite (4), and imbedded in limestone. Colour greenish- 
yellow. Density, 3-697. Analysis gave— 
i II. Mil. 
Silica, PP 46°82 ri. 46°82 
Alumina, . : (26:29 26°12 
Peroxide of iron, } 27:88 1°39 1:39 
Lime, : 2 16°83 17°63 17:28 
_ VOL, LVI. NO. OXIII.— JULY 1854. I 
