maclurea

[Named after Wm. McClure, the American geologist.] Zool .: An anomalous genus of Nucleobranchiate Gasteropod a, family Atlantide. It is discoidal, few 2591 whorled, with a sinistrally sub-spiral operculum. Found in Lower Silurian rocks, in North America, and Scotland. It may be one of the Heteropod a. ma-clûre-ite, s. [Named after Wm. Maclure; suff. -ite ( Min .).] Min.: The maclureite named by Nuttall is included by Dana in the Fa aite group of aluminous pyroxenes (q.v.); that named by Seybert in the same year is the same as chondrodite (q. v.). ma-clûr-in, subst. [Mod. Lat. maclur ( a ); -in ( Chem.).] Chem.: A crystalline body extracted from fustic, Maclura tinct or i a . Dried over sulphuric acid, its formula is C15H1208. Heated to 130° it loses one atom of water, its formation then being C15H1007. It is soluble in water and alcohol, but insoluble in ether. Măc-mil-lan-ite, s. [Foretym. see def.] Eccles. & Church Hist . ( pl .): The followers of the Rev. John Mac mill an, of Balmaghie, in Kirk cud brights hire, Scotland, who, in the latter part of the seventeenth century, aided in laying the foundation of the Reformed Presbyterian or Cameron i an Church. mặc-on, s . [From Macon on the Saone, where the grapes are grown.] A celebrated red French wine, noted for its strength and keeping qualities. ma-con-ite, s. [Named after its locality, Macon County, North Carolina; suff.- ite ( Min .).] Min.: A mineral occurring in irregular scales a ociated with corundum (q.v.), at the Culsagee mine. Soft; specific gravity, 2-827; color, dark brown; luster, pearly. Composition: Silica, 34-22; alumina, 21:53; sesquioxide of iron, 12:41; magnesia, 14:46; potash, 5.70; lo on ignition, 11'85. Exfoliates largely on heating, and is apparently the result of an alteration of a chlorite.