1818.] Scientific Intelligence. 469 



which have been hitherto made. The following table exhibits 

 all these analyses with which I am acquainted. 



1. Common Serpentine. 



Silica 32-00 45-00 44-0 



Magnesia 37-24 33-50 44-0 



Alumina 0-50 Trace . . 2-0 



Lime 10-60 6-25 — 



Oxide of iron 0-60 .. 14-00 7-3 



Oxide of manganese. . . — — 1*5 



Oxide of chromium .... — — 2-0 



Volatile matter 14* 16 — — 



Loss 4-90 1-25 — 



100-00* 100-00 f 100-8| 



2. Precious serpentine. 



Silica 42-50 43-07 



Magnesia 38-63 40-37 



Alumina 1-00 ... ... 0-25 



Lime 0-25 0-50 



Oxide of iron 1-50 1-17 



Oxide of manganese 0-62 — 



Oxide of chromium 0-25 — 



Water 15-20 12-45 



Loss 0-05 2-19 



100-00 § 100-OOH 



Mr. Keferstein, of Halle, has recently published a description 

 of a mineral, which lie considers as a variety of serpentine, and 

 distinguishes by the name of while serpentine. It occurs massive 

 in different beds of serpentine. Its colour is white, often with 

 a shade of green. Fracture, even and dull. Fragments inde- 

 terminate, and not particularly sharp-edged. Difficultly fran- 

 gible. A fatty peel. Its constituents, as determined by the 

 analysis of Bucholz, are as follows : 



Silica 45-| 



Magnesia ^t-tt 



Oxide of iron 2f 



Alumina li 



Lime r R -£-, r 



Water 14 



1QQH4 



So that it ngrees very nearly in its constituents with common 

 serpentine. — (Schweigger's Jour. xxi. 134.) 



* Hisinger, from Norberg, in Sweden. + Knoch ; from the Harts, 



J. V;iu <(in-l i ii ; from Liguria. ^ John. 



|| Ilisingcr: froui Skytlminc, ncai i'alilun. 



