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Contributions to the Mycology of North America. 349 
ion after Dr. Schreibers, (whom, I am happy to learn from 
of. Agassiz still survives, contrary to my impressions when I 
named the mineral,) I am nnable to conjecture. 
Fischer finds the insoluble matter to consist of: 
> SBT68, 
He concludes that the Braunau iron consists s of 95 t0 98 p. c. 
of nickeliferous iron, with traces of cobalt, calcium, magnesium, 
chlorine, &c., (the sulphur and chromium, found by him and Du- 
flos, appearing to belong to the pyrites and the insoluble, scaly 
mineral. He thinks that the constitution of the ri hin pai ae 
not be found constant throughout the mass; and that no two 
analyses will give constant results. 
The little balls of diffused pyrites are found to be a 1 
chemical compound of a simple sulphuret of iron and nicke 
since it dissolves in hydrochloric acid at common temperatures 
with the evolution of hydrosulphuric acid, unattended by the 
separation of sulphur,—there Theta only a little residuum 
(about 1 p. ¢.) which contains chrom carbon and silica. 
The dyslytite constitutes the remaining ingredient ot best: -— 
and is everywhere diffused through it 
Fischer, (after the suggestion of Beraelivs,) attribaies the Wid id- 
mannstattian figures of meteoric iro 4 be ca 
All these ingredients are more or a crystallized. ‘The = 4 
also magnetic ; the nickel-iron and the dyslytite with polarity, 
latter more so than the former; while the magnetic pyrites is 
simply attracted by the magnet. 
New Haven, August 29, 1848. 
Arr. XXXIII.—Contributions to the Mycology of North ba . 
America ; by M. A. Curtis i 
Tue history of Mycology in this country is soon told. Pate: 
ing by the few species noticed by Plukenet, Clayton, Walter, and 
the almost always doubtful matter of Rafinesque, we d M. 
Bosc, first giving any nite and uiteligsts — to our 
Fungi. 
In 1811, he published in the Ber lin Mapes” faivoral new 
species found near Charleston, S. C., where, like Delile at Wil- 
a 
