628 EESIHS. White. G = l'lis. "Without taste or smell. Melts at 210° c. Distils at 260° c, yielding a yellow oil having an empyreumatic smell, and which forms a brownish-yellow crystalline mass on cooling. Bums with a bright flame. Soluble in petroleum, and crystallizes from the solution in long needles. Analysis of psathyrite from Oberhart by Schrotter:— Carbon 78'26 Hydrogen 10’92 Oxygen io - 82 Is found in masses resembling train oil, with hartite in brown coal, at Oberhart near Gloggnitz in Austria. 468. GUY AQUILLITE.—Guyaquillite ; Johnston. Phil. Mag. 13. 329, Dufrenoy. Guyaquillit; Hausmann, Haidinger. Amorphous. Opaque. Bright yellow. Soft, g = 1'092. At 69*5° c melts, at ioo° o is perfectly liquid; after cooling is viscous, translucent, and has a resinous lustre and fracture. Soluble in alcohol, forming a yellow intensely bitter solution. In concentrated sulphuric acid forms a reddish-brown solution. Analyses by Johnston:— Carbon 76'67 77‘35 Hydrogen 8'17 8‘20 Oxygen IS'10 14’46 Is found at Guyaquil in South America. A substance found in the Irish bogs, and known by the name of ‘ bog-butter,’ appears to be allied to guyaquillite. It melts at 50° c, is readily soluble in alcohol, and consists, accord ing to Williamson’s analyses, of— Carbon 73'78 73‘89 Hydrogen 12'50 12’37 Oxygen 13'72 13’74 469. BEKENGELITE.—Berengelite; Johnston. Phil. Mag. 13. 329, Dufrenoy. Berengelit; Hausmann, Haidinger. Amorphous. Eracture conchoidal. Lustre resinous. Dark brown, inclining to green. Streak yellow. Taste hitter. Melts below ioo° c, and remains soft and unctuous. Soluble in cold alcohol, forming a bitter solution, and in aether. Analyses by Johnston:— Carbon 72'47 72'34 Hydrogen 9'20 0'36 Oxygen 18'33 18 - 30