244 ANNUAL RECORD OF SCIENCE AND INDUSTRY. 



Agulhas current, are considered. The precise problem of 

 the forms of the recent greensands, or rather of glauconite 

 matter, at given depths in the red clay, is not yet satisfac- 

 torily answered. 1 A, May 7, 199. 



ZOXOCHLORITE AND CHLOEASTROLITE. 



Some time ago, under the name of zonochlorite, Professor 

 Foote described a mineral species found at Neepigon Bay, 

 Lake Superior. This species has recently been re-examined 

 by Mr. George W. Hawes, who placed thin sections of it un- 

 der the microscope. It consists of green earthy particles 

 disseminated in a white mineral, and hence is evidently not 

 a true species, but a mixture. Analysis shows it to be es- 

 sentially nothing but a very impure variety of prehnite. 

 The chlorastrolite from Isle Koyale has also been reinvesti- 

 gated by Mr. Hawes, both chemically and microscopically. 

 This, too, appears to be but a mixture similar to zonochlo- 

 rite. Its specific gravity is somewhat higher than that of 

 pure prehnite, a fact which Mr. Hawes thinks may be due to 

 a slight admixture of cpidote. 



WAPPLERITE. 



This new species is found at Joachimsthal, in crystalline 

 crusts resembling hyalite, in small botryoidal aggregates, 

 and in crude vitreous masses. It is a hydrated calcium 

 arseniate, containing eight molecules of water. Three of 

 these molecules are driven off by a temperature of 100 

 Centigrade, when, like pharmacolite, it is converted into hai- 

 dingerite. Frenzel is the discoverer. 



CLAEITE. 



Under this name Roemer describes a dimorphous modifi- 

 cation of enargite, found in the Clara mine, near Schapbach, 

 in the Baden Black Forest. Chemically it is enargite, but 

 varies from the latter in color, density, and crystalline form. 

 Clarite is dark, lead gray, and monoclinic; enargite is iron 

 black, and rhombic. 



CHALCOPIIANITE. 



Under the above name Dr. Gideon E. Moore describes a 

 new mineral from the zinc mines at Stirling Hill, Ogdens- 



