Photocopy of photograph (Source unknown, c. 1896) EXTERIOR, GENERAL VIEW OF TOWN - Quartz Mountain, General View, Quartz, Tuolumne County, CA
Quartz Mountain, General View, Quartz, Tuolumne County, CA
Quartz mine and mill - famous de Lamar mine and mill
Quartz mining works at Gold Hill
The Detroit news timely topics. Fused quartz
Nevada quartz mill
Rocky Bar Quartz Mill, Grass Valley, Nevada County
Ophir Quartz Mill, Grass Valley, Nevada County
Ione Quartz Mill, two miles from Grass Valley, Nevada County
Quartz Mill, Silver Mountain, Alpine County
Interior of Buckeye Quartz Mill, Washoe City
Quartz
Quartz mining
The Gould & Curry Quartz Mill, from the West
Scene on Quartz Hill
[A 7,000 dollar pan of selected gold nuggets from Quartz Creek, Yukon Territory]
Mechanical slicing machine for cutting wafers from rough quartz
New York, New York(?). Grinding thin wafers of quartz to close tolerances, for use as radio crystal oscillators. Five hundred crystals a day can be produced by this firm which previously manufactured ...
Workman finishing setting for quartz crystal cutting tool on W & S lathe
[Man with a group of 100 kHz quartz crystal oscillators which served as the U.S. National primary frequency standard in 1929]
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