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A new Ore of Copper and it* Metallurgy: Trans. Am. Inst. Min. Engineers, vol. iv, 

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On the History of the crystalline stratified Bocks (abstract) : Proe. Am. Assoc. Adv. 

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Geology of eastern Pennsylvania: I'm,-. .1;/*. Assoc. Adv. ScL, 1876, pp. 208-212. 



A Century's Progress in theoretical Chemistry: American Chemist, vol. v. pp. 4(i- 

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TheGoderich [Canada] salt Region: Trans. Am. Inst. Min. Engineers, vol. v, IS77, 

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The geological Relations of the Atmosphere (abstract): Nature, vol. xviii, p. 475. 



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Sur les relations geologiques de l'atmosphere : Comptes !>'■ ml",* </< VAcad. d< Sci. 

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Geology of the Eozoic Rocks of North America: Proc. Host,,,, Soc. Nat. Hist., vol. 

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( Iheniical ami geological Essays, 1878. 



The History of some pre-Cambrian Rocks in America ami Europe : Canadian Nat- 

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< ieological Notes or Abstracts of recent Papers : 

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 •_'. The ( renesis of certain iron ( )i« 

 :;. The < >rigin of Anthracite. 



4. The recent Formation of Quartz and on Silicification in California. 

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