mineral exploration

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On the magnetite ore districts of Jacupiranga and Ipanema, Sao Paulo, Brazil
O. A. Derby

American Journal of Science April 1891, s3-41 (244) 311-321; DOI: https://doi.org/10.2475/ajs.s3-41.244.311
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The norites of the Cortlandt Series on the Hudson River near Peekskill, NY
G. H. Williams

American Journal of Science March 1887, s3-33 (195) 191-199; DOI: https://doi.org/10.2475/ajs.s3-33.195.191
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Wm. B. Roger's geology of the Virginias; a review
J. L. Campbell and H. D. Campbell

American Journal of Science March 1886, s3-31 (183) 193-202; DOI: https://doi.org/10.2475/ajs.s3-31.183.193
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Peculiar modes of occurrence of gold in Brazil
O. A. Derby

American Journal of Science December 1884, s3-28 (168) 440-447; DOI: https://doi.org/10.2475/ajs.s3-28.168.440
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On the flexibility of itacolumite
O. A. Derby

American Journal of Science September 1884, s3-28 (165) 203-205; DOI: https://doi.org/10.2475/ajs.s3-28.165.203
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The influence of light on the electrical resistances of metals
A. E. Bostwick

American Journal of Science August 1884, s3-28 (164) 133-145; DOI: https://doi.org/10.2475/ajs.s3-28.164.133
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Note on the decay of rocks in Brazil
O. A. Derby

American Journal of Science February 1884, s3-27 (158) 138-139; DOI: https://doi.org/10.2475/ajs.s3-27.158.138
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Notice of corundum gems in the Himalaya region of India
C. U. Shepard

American Journal of Science November 1883, s3-26 (155) 339-340; DOI: https://doi.org/10.2475/ajs.s3-26.155.339
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Modes of occurrence of the diamond in Brazil
Orville A. Derby

American Journal of Science July 1882, s3-24 (139) 34-42; DOI: https://doi.org/10.2475/ajs.s3-24.139.34
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On the gold-bearing rocks of the province of Minas Geraes, Brazil
O. A. Derby

American Journal of Science March 1882, s3-23 (135) 178; DOI: https://doi.org/10.2475/ajs.s3-23.135.178

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