Samuel Lewis Penfield. 367 



1900 Contactgonionieter und Transporteur von Einfacher Construction. 



Zeitschr. fur Kryst. , xxxiii, 548-554. 

 On the Chemical Composition of Turquois. This Journal (4), x, 346- 

 350. 



1901 The Stereographic Projection and its Possibilities from a Graphical 



Standpoint. Ibid., i, 1-24. 

 On Calaverite (with W. E. Ford). Ibid., xii, 225-246. 



1902 New Occurrence of Sperrylite (with H. L. Wells). Ibid., xiii, 95-96. 

 Use of the Stereographic Projection for Geographical Maps and Sail- 

 ing Charts. Ibid., xiii, 245-275, 347-376. 



On the Solution of Problems in Crystallography by means of Graph- 

 ical Methods based on Spherical and Plane Trigonometry. Ibid., 

 xiii, 249-284. 



1903 Tables of Minerals : Including the Uses of Minerals and Statistics of 



the Domestic Production. 8°, 77 pp. (New Haven, Conn.) 



1905 On Crystal Drawing. This Journal, xix, 39-75. 



On Tychite, a New Mineral from Borax Lake, California, and on its 

 Artificial Production and its Relations to Northupite (with G. S. 

 Jamieson). Ibid., xx, 217-924. 



1906 On the Drawing of Crystals from Stereographic and Gnomonic Pro- 



jections. Ibid., xxi, 206-215. 

 Filter Tubes for Collection of Precipitates on Asbestos (with W. M. 



Bradley). Ibid. , 453 -466. 

 On Stibiotantalite (with W. E. Ford). Ibid., xxii, 61-77. 



