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EAIIEERZ. 207 dark as those which contain little or no arsenic.. In the varieties containing zinc the streak is red. Analyses of fahlerz a from Kapnik, b from Gersdorf near mine in Dillenburg, e from the Zilla mine near Claustbal, f from the St. Wenzel mine near Wolfaeh, all by H. Bose :— a b C d e / Copper . . 3798 38-63 40-60 38-42 34-48 25-23 Silver . . 062 2-37 0-60 0-83 4-97 17-71 Iron . . O'80 4'89 4-66 1-52 2-27 3'72 Zinc . . 7'29 2-70 3'69 6’85 5-55 3-10 Antimony . 23'94 16-52 12-46 25-27 28-24 26-63 Arsenic. . 2-88 7-21 10-19 2-26 — — Sulphur 25-77 26-33 26-83 25-03 24-73 23-52 9 h i k I m 3694 35-90 34-86 14-81 35-7 30-47 7'73 2-70 15-70 lead 0-9 0-78 trace 0-33 — 31-29 8-9 10-48 6-04 1-93 226 5-98 4'5 3’52 1-04 6-24 1'35 0-99 — 3’39 19-02 27-47 21-53 24-63 26’8 26-56 4'09 — — — — -— 24-00 23-40 23-15 21-17 24-1 24-80 Analyses of fahlerz g from Kotterbach near Iglo in Hungary by Seheidtliaucr, 7t from the valley of Angina in Tuscany (a = 4'8i) by Kersten ; i from Schwatz (o = 6’107) by Weidenbusch; k from the Ilabacht mine near Freiberg by H. Bose, I from Claustbal by Sander, m from the Meiseberg (a = 4'862) by Bammelsberg Copper . Mercury Silver Iron . . Zinc . . Antimony Arsenic . Sulphur . In crystals attached and aggregated in druses; massive and disseminated. Occurs in beds with towanite, chalybite, quartz; in veins with galena, blende, and baryte. Is found at Andreasberg, Claustbal, Goslar and Zellerfeld in the Harz, Neudorf in An halt, Dillenburg in Nassau, Falkeustein near Schwatz in the Tyrol, Kapnik in Transylvania, Schemnitz, Kremnitz and Schmolnitz in Hungary, Wolfaeh and Sehriessheim in Baden, Hrkolnow near Przibram in Bohemia, in Stiria, Freyberg in Saxony, Mansfeld, Siudfeld and Kamsdorf, in the Vosges, Beresow near Katharincnburg in Siberia, Mexico, Chile, Ohi- vato in Peru, Cook’s Kitchen and Crinnis (sparingly) in Cornwall ; Tavistock and Beeralstone in Devonshire, Fassney Burn in East Lothian, Airthrie in the Ochil hills in Scotland, Mainland Shetland.