47 
245. AZURITE CRYSTALS. Bisbee, Arizona. 
246. FERRIFEROUS CUPRITE. Bisbee, Arizona. 
247. PHANTOM QUARTZ. Japan. 
248. ZINCITE PYRAMID 3, from Franklin, N. J. 
249. TOURMALINE TWIN, from Franklin, N. J. 
250. VESUVIANITE CRYSTALS embedded in Garnet, from Pied- 
mont. 
Exhibit of W. D. Matthews. 
251. CARBORUNDUM SUITE consisting of (a2) Carborundum as it 
comes from the furnace, blue variety. (4) Same, green variety. 
(c) Amorphous variety, formed at lower temperature. (d) 
Graphite, a by-product. (¢) Grinding wheel of Carborundum. 
(7) Whetstone of Carborundum. 
Nos. 222-251 exhibited by Mineralogical Department, School 
of Mines, Columbia College, through Alfred J. Moses. 
252. LARGE PHANTOM CALCITE. Joplin, Mo. 
253. PHANTOM CALCITES, from Burnet, Texas. 
254. QUARTZ GROUP, from Butte, Mont. 
255. FOSSIL SPECULAR IRON ORE, from Cherry Valley, Mo. 
256. CLUSTER OF SPHALERITE CRYSTALS, with implanted crystals 
of Chalcopyrite. Joplin, Mo. 
257. ONE LARGE HANKSITE. Borax Lake, Cal. 
Nos. 252-257 exhibited by Frank L. Nason: 
258. GROUP OF HALITE CRYSTALS. Borax Lake, Cal. 
259. THENARDITE CRYSTALS. Borax Lake, Cal. 
Nos. 258, 259 exhibited by Department of Geology, Ameri- 
can Museum Natural History. 
260. NATIVE LEAD. Langban, Sweden. 
261. SULPHUR. Cianciana, Sicily. 
262. MALYBDENITE. Aldfield township, Pontiac Co., Quebec, 
Canada. 
