138 WARM AN 



Reprinted as follows : 

 The mineral exhibits of the Chicago exposition. (Special.) 



In Kuhlow's German Trade Review, and Exporter, issue 

 for Wednesday, November 22, 1893, vol. 18, pp. 4503-4504, 

 Berlin, 1893, folio. 



35. General work in [geologic] taxonomy. 



In United States Geological Survey, Fourteenth Annual 

 Report, Part I, pp. 65-122, Washington, 1893, royal 8°. 



Headings : growth of classification ; relations of sedimen- 

 tary rocks ; correlation of sedimentary formations ; relations 

 of igneous rocks ; summary of work on igneous rocks ; rela- 

 tions of the ancient crystalline rocks ; summary of work on 

 Algonkian and Archean rocks ; relations of Pleistocene de- 

 posits ; nature and results of the surveys of glacial forma- 

 tions ; relations of land forms ; r^sum^. 



36. General summary of work in terrestrial physics, 1880-1892. 



In United States Geological Survey, Fourteenth Annual 

 Report, Part I, pp. 143-165, Washington, 1S93, I'oyal 8°. 



Treats of : rigidity ; cohesion and chemic action ; pyrom- 

 etry ; piezometry ; compressibility and thermal expansion ; 

 continuity of liquid and solid states ; igneous fusion as related 

 to pressure ; geysers and hot springs ; isogeotherms ; high 

 pressure chemistry ; sedimentation ; heat conduction ; elec- 

 trical activity of ore bodies. 



1894-1895. 



37. Explanation [of the Geologic Atlas of the United States] . 



In United States Geological Survey, Geologic Atlas of the 

 United States, folios 1-20, pp. 2-3 of the cover of each folio, 

 I 894- I 895. 



An explanation of the plan and uses of the atlas. 



See, also, No. 42. 



1895. 



38. Physiographic processes. By J. W. Powell. 



In National Geographic Monographs, prepared under the 

 auspices of the National Geographic Society, vol. i (No. i, 

 for March, 1895), pp. 1-32, New York, Cincinnati, Chicago, 

 American Book Company, 1895, royal S°. 



Major headings are : the atmospheric envelope ; the aqvie- 

 ous envelope ; the rock envelope ; interpenetration of the en- 

 velopes; vulcanism, diastrophism, and gradation. 



