Samuel Lewis Penfield. 365 



1887 Phenacite from Colorado. Ibid., xxxiii, 130-134. 



On the Chemical Composition of Howlite (with E. S. Sperry). Ibid., 



xxxiv, 220-223. 

 Triclinic Feldspars with twinning striations on the Brachypinacoid 



(withF. L. Sperry). Ibid., 390-393. 



1888 On the crystalline form of Polianite (with E. S. Dana). Ibid., xxxv, 



243-247. 

 Bertrandite from Mt. Antero, Colorado. Ibid., xxxvi, 52-55. 

 Mineralogical Notes (with E. S. Sperry). Ibid., 317-331. 



1889 On the Crystalline form of Sperry lite. Ibid., xxxvii, 71-73. 



On some curiously developed Pyrite crystals from French Creek, 

 Chester Co., Penna. Ibid., 209-212. 



Crystallized Bertrandite from Stoneham, Maine and Mt. Antero, Colo- 

 rado. Ibid., 213-216. 



Eesults obtained by etching a sphere and crystals of quartz with 

 hydrofluoric acid (with Otto Meyer). Trans. Conn. Acad., viii, 

 158-165. 



1890 On Lansfordite, Nesquehonite a new mineral, and Pseudomorphs 



of Nesquehonite after Lansfordite (with F. A. Genth). This 

 Journal (3), xxxix, 121-137. 



On Spangolite, a new Copper Mineral. Ibid., 370-378. 



On Hamlinite, a new rhombohedral mineral from the Herderite local- 

 ity at Stoneham, Me. (with W. E. Hidden). Ibid., 511-513. 



Fayalite in the Obsidian of Lipari (with J. P. Iddings). Ibid., xl, 

 75-78. 



On Connellite from Cornwall, England. Ibid., 82-86. 



Crystallographic Notes (with F. A. Genth). Ibid., 199-207. 



Chalcopyrite crystals from French Creek, Penna. Ibid., 207-211. 



Anthophyllite from Franklin, Macon Co., N. C. Ibid., 394-397. 



On the Beryllium minerals from Mt. Antero, Col. Ibid., 488-491. 



1891 Chemical Composition of Aurichalcite. Ibid., xli, 106-109. 

 Crystallographic Notes (with F. A. Genth). Ibid., 394-400. 



The minerals in hollow Sperulites of Rhyolite from Glade Creek, 

 Wyoming (with J. P. Iddings). Ibid., xlii, 39-46. 



1892 On Caesium Trihalides (by H. L. Wells) and their Crystallography. 



Ibid., xliii, 17-32. 

 Crystallographic Notes (with F. A. Genth). Ibid., 184-189. 

 Crystallography of the Eubidium and Potassium Trihalides. Ibid., 



475-487. 

 On Polvbasite and Tennantite from Mollie Gibson Mine, Aspen, Col. 



(with S. H. Pearce). Ibid., xliv, 15-18. 

 Crystallography of the Alkali-Metal Pentahalides. Ibid., 42-49. 

 On Herderite from Hebron. Maine (with H. L. Wells). Ibid., 114-116. 

 Crystalline form of RbCl.HI0 3 and CsCl.HI0 3 . Ibid., 132-133. 

 Crystallography of double halides of silver and alkali-metals. Ibid., 



155-157. 

 Crystallography of Caesium and Rubidium Chloraurates and Brom- 



aurates. Ibid., 157-162. 

 Crystallography of the Cassiuui-Mercuric Halides. Ibid., 311-321. 

 Crystallographic Notes (with F. A. Genth). Ibid., 381-389. 



1893 On Cookeite from Paris and Hebron, Maine. Ibid., xlv, 393-396. 

 Mineralogical Notes (Zunyite, Xenotime). Ibid., 396-399. 



On Pentlandite from Sudbury, Ontario. Ibid., 493-497. 



On Canfieldite, a new Germanium Mineral and on the Chemical com- 

 position of Argyrodite. Ibid., xlvi, 107-113. 



Minerals from the Manganese Mines of St. Marcel, Piedmont. Ibid., 

 288-295. 



1894 Chemical Composition of Staurolite and on its Inclusions (with J. H. 



Pratt). Ibid., xlvii, 81-89. 

 Chemical Composition of Chondrodite, Humite and Clinohumite 

 (with W. T. H. Howe). Ibid., 188-206. 



