144 Miscellaneous. 
The group A offers no analogy with the same mineralogist’s ‘Jade 
vert,’ or ‘Jadéite,’ from China, the chemical formula of which is 
3(Na Ca Mg Fe) ae 2A12+4 9Si. The examination of two conspicuous 
varieties, examined in Dr. Fehling’s laboratory at Stuttgart, has given 
the following results :—a (‘ Tangiwaii’), translucent ; structure, scaly 
laminated; hardness between cale-spar and felspar; specific gravity 
261; infusible before the blowpipe; chemical formula AVS? + 
11(M¢Ca Fe K)Si+H. 6 (‘Kawa-Kawa’), translucent at edges ; scaly 
laminated ; between fiuor-spar and quartz in hardness; specific 
gravity, 3°02; fused with difficulty before blowpipe; chemical for- 
mula Al2Si?+5(Mg Fe K)Si + H. By calculating these analytical 
results according to the theory of polymeric isomorphism, the general 
formula R*Si8, with the proportion of oxygen=1 ; 8 (as in steatite 
and meerschaum) is obtained. Count M. 
GEOLOGICAL EXAMINATION UNDER THE SCIENCE AND ART 
DerartMent.—The Science and Art Department of the Committee 
of Council on Education, as a part of their scheme for aiding the 
Working Classes in scientific instruction, held examinations in the 
Applied, Physical, and Natural Sciences, in May last, at the several 
localities where classes had been preparing in compliance with the 
requisite conditions. The chief centres of examination in Geology 
were Stroud, Netherton, Holywood and Belfast, Bristol, Waterford, 
Liverpool, Glasgow, Cheitenham, Salford, Wigan, and Banbridge. 
The examiner was Prof. Ramsay, F.R.S., G.S. The character of 
the examination may be judged of from the following selected ques- 
tions from the examination-paper of May 23rd :— 
Name the substances of economic value extracted from the Carboniferous series. 
12. 
Explain the reason of the occurrence of different qualities of spring-waters or of 
river-waters, with or without examples. (12.) 
Tn what British formation do the remains of terrestrial quadrupeds first occur ? 
10. 
ame some of the chief balding stones of Britain, state their general minera- 
logical composition, and the formations to which they belong. (22.) 
Explain the theory of slaty cleavage. (24.) 
Name the chief British formations from which ores of iron are obtained for 
economic purposes. (18.) 
Name the genera of Crustacea (exclusive of Trilobites) found in the formations 
that range between the base of the Lingula-flags and the top of the Upper Silurian 
strata. (20.) 
Explain the connection of three or four geological formations with the agricul- 
tural or pastoral state of the country in which they lie. (20.) 
Name some of the chief leading points in the grouping of fossils that distinguish 
the Paleozoic rocks from those of Mesozoic (Secondary) age. (20.) 
What is the reason that the strata of coal-ficlds frequently lie in hasin-shaped 
eurves? (18.) 
What stratified formations in the British islands are associated with trae volcanic 
rocks ? and name the districts in which these volcanic rocks are found. (20.) 
The results have now been published. There were 164 candidates: 
of these, 15 gained Ist class prizes; 21 2nd class, 54 8rd class, 
35 were honourably mentioned, 82 merely passed the examination, 
27 failed.—R. T. 
