4 BULLETIN 12, UNITED STATES NATIONAL MUSKUM. 



(5) Coarse flake, from hydraulic wasbiugs. October, 1868. Wasbington claiui, 

 Butte County, California. (.55473. ) 



(6) Dust. First discivery in California, froui tail race 200 yards belovr the mill, 

 panned by J. W. Marshall on the evening of the IDth and 20th of January, 1848. 

 Marshall's claim, Sutter's mill, Colonia, El Dorado County, California. (55480.) 



(7) Spire gold, high grade, from hydraulic washings in ancient river bed." Novem- 

 ber, 1855. Blue Gravel lead, Swartzville, Californi;t. (.55477.) 



(8) Nugget, obtained by pan-washing. October, 185'.). Foothills, Jacksonville, 

 near branch of Rogue River, Oregon. (55466.) 



(9) Nuggets. November, 1865. Williams' claim, lioh6. Basin, Placerville, Idaho. 

 (55464.) 



(10) Nugget from the first discovery claim. Weight, 1 ounce. October, 1869. 

 Loon Creek, Boi86 County, Idaho. (55467. ) 



(11) Gold-dust sack. Made of buckskin and used for holding gold dust. (30533.) 



QUARTZ GOLD. 



To illustrate quartz gold fifteen specimens ^re shown, beginning 

 with crystallized gold in a cavity in quartz, and following through vari- 

 ous stages of crystallization of the gold and decomposition of the matrix 

 to a natural alloy of gold and silver in wholly decomposed material. 



(1) Free gold, crystallized in a cavity in quartz, with a little pyrite. Plumas Eu- 

 reka Mine, Plumas County, California. (15048.) 



(2) Free gold, crystallized on ferruginous quartz. Brewer Gold Miue, Chesterfield 

 County, South Caorlina. (5.5546.) 



(3) Free gold, crystallized in ferruginous quartz. Love's mine, Richardsville, Cul- 

 peper County, Virginia. (30927.) 



(4) Free gold, crystallized in quartz. Ellis Mine, Union County, Georgia. (5195.) 



(5) Free gold, in (quartz stained by decomposition i)rodncts. Whytlatch Union 

 Mine, Owyhee Park district, Lewis and Clarke County, Montana. (11140.) 



(6) Free gold, in (juartz. Narcoochee Mine, AVliite County, Georgia. (5199.) 



(7) Free gold, in quartz stained with iron. Valparaiso Mine, Amador Couuty, Cali- 

 fornia. (14975.) 



(8) Free gold, in quartz. Norman Miue, Amador Couuty, California. (14982.) 



(9) Free gold, in quartz, the white and pure quartz carrying the gold appearing 

 like a vein in an impure ferruginous quartz. Republic Mine, Biveus Gulch district, 

 Madison County, Montana. (11082.) 



(10) Free gold, finely disseminated through quartz. GambriuusMine, oois6 County, 

 Idaho. (14T70.) 



(11) Free gold, in ferruginous quartz. The gold in thin flakes is quite evenly dis- 

 tributed through the (juartz. Kennet Extension Mine, Madison Range District, Mad- 

 son Co., Montana. (11080.) 



(12) Free gold, in quartz containing sulphurets that have been very much decom- 

 posed. Whytlatch Union Mine, Owyhee Park district, Lewis and Clarke County, 

 Montana. (10921.) 



(13) Free gold, in the ferruginous i^ebbles of a conglomerate. Lone Star Mine, 

 Nevada Springs, Nevada County, California. (14935.) 



(14) Free gold, in quartz and also in galena. No, 6 Mine, Cherokee County, North 

 Carolina. (5239. 



(15) Gold, alloyed with considerable silver in decomposed material ; from 400 feet 

 deep. Silver Hill Mine, Comstock Lode. Storey County, Nevada. (1.5221'.) 



SULPHUltKT (iOI.I). 



Two s))ocimens of crystallized i)yritc' are shown to illustrate the oc- 

 currence of suli)huret gold. Since the gold is entirely invisible there 



