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Rogers, Austin Flint — Continued. 
2084. Stober's method of making crystal drawings. — School of Mines Quart., 
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2085. The gnomonic projection from a graphical standpoint. — School of Mines 
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2086. Aegirite and riebeckite rocks from Oklahoma. — Jour. Geology, vol. 15, 
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Coal measures faunal studies, IV. Upper coal measures, Neosho River sec- 
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Rosenbusch, H. 
2087. Remarques sur la roca verde et les intercalations argileuses dans 
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2088. Remarques sur quelques roches eruptives de la region de la Sierra 
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2089. Remarques sur les roches eruptives de la region de la Sierra de Mazapil 
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Ross, J. G. 
A peridotite dike in the coal measures of southwestern Pennsylvania. — See 
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Rowe, Jesse Perry. 
2090. Montana coal and lignite deposits. — Montana Univ., Bull. no. 37 (Geol. 
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Describes the location, extent, and geology of the various coal and lignite fields of the 
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2091. Montana coal and lignite deposits. — Min. World, vol. 26, pp. 62-65, 
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2092. Montana coal mines. — Mines and Minerals, vol. 27, no. 11, pp. 481^84, 
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2093. Montana gypsum deposits. — Mines and Minerals, vol. 28, no. 2, pp. 
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Rowley, R. R. 
2094. [Descriptions of fossils.] — Contributions to Indiana Paleontology. 
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2095. [Descriptions of fossils.] — Contributions to Indiana Paleontology. 
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Gives descriptions of various species of trilohites and crinoids. 
Rubio, Pascual Ortiz. 
2096. El Axalapazco de Tacambaro. — Soc. Geol. Mexicana, Boh, t. 2, pp. 
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Describes a crater lake and discusses its origin. Includes notes on the rocks in the 
vicinity. 
Ruedemann, Rudolf. 
2097. Cephalopoda of the Beekmantown and Chazy formations of the Cham- 
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2098. The Lower Siluric paleogeography of the Champlain basin. — Abstract: 
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