272 Scientific Intelligence. 
pee nes species is here exhibited, as in the writer’s recent paper 
ready referred to; but a relation is somewhat different in kind, and 
depot on less simple ra , &8 is seen in the method of comparing 
Calcite and Corundum. The relations Pibtiesien sisi and dimetric 
Species is not touched uv 
-Von Ko 
Ze 
The ogee Chloritoid has a blackish- green color and is associated 
with 7 An analysis, made with special precautions, afforded 
bell : 
Si | Fe ‘Fe H 
26:19 38°30 600 21-11 3:30 5°50 = 10040 
Oxygen 13:59 17-90 1-79 468 182) 488" 
from which results he deduces the formula 
(Fe, wis)? Al+ 2A Bi +s3H or Fe Al+2418i+ Mg? ae 
to a, waked mass. Decomposed perfectly * aniiheie acid, and 
imperfectly by muriatic. The analysis afforded von Kobell:; 
Bi Al Be €r Mg Fe H 
33°49 15°37 2°30 055 32:94 | 4°25 11-50 = 100-40 
Oxygen. 17°38 718 O69. OY 13:17 094 01 
giving him the formula 
8Mgs Bi: 21 Si+ 3Mg Fis. 
This Clinochlore occurs in Serpentine. 
3. On the Alteration of Scapolite; by G, v, Ratu, (Pogg.» xe, 288.) 
—This paper is a continuation of an extended examination of Scapolites 
by von Rath. The author here gives analyses of different altered 
Scapolites, 
(1.) Mica after Scapolite, from Arendal, Norway. The altered crys- 
tals are 6 inches in length; they are covered with mica cae “ 
consist of an aggregation of scales of the same.. G. =2°83: =25. 
Analysis— 
. Bi B.:  Be..; Oe: oH! yo diee at a6 
“4449, 2491 48 3-14 ite 671) Ll 344. lil 
sshenoe:.the ratio for k, B Bi, 0-38: 2-12: 4. The analysis 
oxygen 
shows an addition of 671 of potash, not found in the unaltered Sc 
lite of Arendal, besides a removal of the larger part of the lime by 
carbonic acid, ial eles olka changes. 
