1894.] Mineralogy and Petrography. 521 
Giimbel” as existing in the slowly cooled silicate slags from the lead 
furnace at Friehung near Vilseck in Bavaria. 
V. Goldschmidt” calls attention to the advantage of glass over 
charcoal in securing sublimates of volatile substances arising during 
blowpipe analysis. He also gives the description of an apparatus 
which enables the manipulator to reduce his metallic compounds upon 
charcoal and collect their sublimates upon ordinary object glasses, 
*Zeits. f. Kryst., XXII, p. 269. 
*Zeits. f. Kryst., XXI, p. 329. 
