Prof. J. W. Mallet on Nitride of Zirconium. 847 
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ing, I think, the likelihood of their being silicon itself, derived 
either from the aluminum or the lime; the absolute amount, 
gold-like crusts; with a po ste of 400-600 they were 
the 
being imbedded in a colorless glassy matrix, probably a com- 
pound of zirconia and lime. One was reminded by them of the 
sition was not determined quantitatively, owing to want of suf- 
ficient material, for much of the zirconium combined with 
f : 
* Ann. d. Chem. u. Pharm, Mai, 1859, 8. 249. 
