440 PROCEEDINGS OF BALTIMORE MEETING. 



Geological excursion by university students across the Appalachians in May, 1891 : 



Johns Hopkins University Circulars 94, December, 1891. 

 A university and its natural environment : Address before the Johns Hopkins 



University: Ibid., 96, March, 1892. 

 Crystals of metallic cadmium: Am. Chem. Jour., vol. xiv, p. 274. 

 Geology of Baltimore and vicinity. Part I. Crystalline rocks : Guidebook for Am. 



Inst. Min. Engineers, Baltimore, February,' 1892, pp. 77-124. 

 Geological map of Baltimore and vicinity : Published by the Johns Hopkins Uni- 

 versity, G. H. Williams, editor, October, 1892. 

 The volcanic rocks of South mountain in Pennsylvania and Maryland: Am. Jour. 



ScL, vol. xliv, December, 1892, pp. 482-496. [Reprinted in Scientific American, 



January 14, 1893, and abstract in Johns Hopkins University Circulars 103.] 

 The microscope and the study of the crystalline schists : Science, January 6, 1893. 

 A new machine for cutting and grinding thin sections of rocks and minerals : Am. 



Jour. ScL, vol. xlv, February, 1893, p. 102, and Johns Jlopkins University Circulars 



103. 

 Maps of the territory included within the state of Maryland, especially the vicinity 



of Baltimore : Johns Hopkins University Circidars 103, February, 1893. 

 On the use of the terms poikilitic and micropoikilitic in petrography : Jour, of 



Geology, vol. i, no. 2, February, 1893, p. 176. 

 Piedmontite and scheelite from ancient rhyolite. South mountain, Pennsylvania: 



Am. Jour. Sci., vol. xlvi, July, 1893, p. 50. 

 Crystalline rocks from the Andes: Jour, of Geology, vol. i, no. 4, 1893, p. 411. 

 Geology and mineral resources of Maryland, with geological map : In the book 



"Maryland," published by the State Board of Managers for the World's Fair 



Commission, July, 1893. (G. H. Williams and Wihiam B. Clark.) 

 Geology and physical features of Maryland: Johns Hopkins press, 1893. (G. H. 



Williams and William B. Clark.) 

 On the crystal form of metallic zinc : Ain. Chem. Jour., vol. xi, no. 4. (G. H. Wil- 

 liams and W. M. Burton,) 

 Distribution of ancient volcanic rocks along the eastern border of North America : 



Jour, of Geology, vol. ii, no. 1, 1894, pp. 1-31. 

 Mineral and petrographical exhibits at Chicago : Am. Geologist, vol. xiii. May, 1894, 



pp. 345-352. 

 Johann David Schoepf and his contributions to North American geology : Bull. Geol. 



Soc. Am., vol. 5, 1893, pp. 591-593. 

 On the natural occurrence of Lapis lazuli : Johns Hopkins University Circidars 114, 



July, 1894, pp. Ill, 112. 

 Introduction to "The Granites of Maryland," by Charles P.. Keyes : Fifteenth Ann. 



Rep. U. S. Geol. Survey. [In press.] 

 Washington, Frederick, Patapsco and Gunpowder atlas sheets of the United States : 



U. S. Geol. Survey. [In press.] (G. H. Williams and others.) 



In testimony of regard to the memory of Dr Williams tributes were 

 paid by B. K. Emerson, his first teacher in geology ; J. F. Kemp, a col- 

 lege-mate, and by his friends and colleagues, J. P. Iddings, I. C. White, 

 C. D. Walcott, W. S. Bayley and N. S. Shaler. 



