6 



Hygieine. Mineralogie. Geognosie. 



Cole G, Devitrification of cracked and brecciated Obsidian. Ibid. 272. 

 Fox H, On the Occurrence of an Aluminous Serpentine with flintlike 



appearance near Kynance Cove. Ibid. z7ö. 

 Fletcher L, The Optical Indicatrix and the Transmission of Light in 



Crystals. Ibid. 278. 

 Neddle M, On the Occurrence of Sapphire in Scottlaud. Ibid. 389. 



— On the Optic Properties of Gyrolite. Ibid. 391. 



Irving A, Note on the Occurrence of Melanterite in the Upper Eocene 



Strata of the Thames Basin. Ibid. 392. 

 Kunz G, Tysonite and Bastnäsite. Ibid. 394. 



— Meteoric Iron from Indian Valley Township, Virginia. Ib. 394. 



— Anatase. Ibid. 395. 



- Sapphire. Ibid. 395. 

 Kelvin L, On the Elasticity of a Crystal according to Boscovich. 



London, Roy. Soc. Proc, Vol. 54. 59. 

 Ewing J and Klaassen M, Magnetic Qualities of Iron Ibid. 75. 

 Chapmann E, On the Mexican type in the crystallisation of the Topath. 



Montreal, Roy. Soc. of Can. Trans, a. Pr. Vol. X. S. III. 25. 

 Agapionow W. Erscheinungen von Polymorphismus in dem anorga- 

 nischen Reiche (russ.). MOSCOU, Soc Imp. Nat. Ball. 1893. 65. 

 Karnozieky A, Kurze Uebersicht der neueren Arbeiten üb. Krystallo- 



graphie (russ.). Ibid. 145. 

 Willcox J, Metamorphism of Sedimentary Rocks. Philadelphia, 



Ac. Nat. Sei. Proc. 1893. P. I. 10. 

 Goldsmith E, Notes on on same Minerals and Rocks. Ibid. 174. - 

 Dafert E u. Derby 0, The Separation of minerals of high specific 



gr avity. Rochester, Ac. Sei. Proc. Vol. IL Br. 2. (1893). 121. 

 Preston H, Preliminary note of a new Meteorite from Kenton County, 



Kentucky. Ibid. 151. 

 Ward H, Preliminary note of a new Meteorite from Japan. Ibid. 171. 

 Novarese V, Calcari cristallini e calcefiri dell'Arcaico calabrese. 



Roma, Com. geol. Boll. 1893. 17. 

 Inclusioni liquide nel gesso di Sicilia. Ibid. 108. 

 PÖhlmann R, Ueber das Vorkommen von Zirkon als mikroscopischem 



Gemengtheil chilenisch. Eruptivgesteine. Santiago (Chile), 



Deutsch. Wiss. Ver. Verh. Bd. IL Heft 4 (1892). 235. 



— Gypskristalle reich an Beimengungen eines feinen Sandes, von 

 Carcote in Bolida. Ibid. 238. 



— Gesetzmässige Verwachsung von Gyps mit Kalkspath von Cara- 

 coles. Ibid. 239. 



— Phosphorescierende Zinkblende aus d. Provinz Linares. Ib. 240. 



— Melilithschlacke vom Schmelzwerk Bandurrias b. Copiapo. Ib 241. 

 Clarke Fr, Report of work done in the division of Chemistry and 



Physics, mainly during the fiscal year 1890—91. Washing- 

 ton, Geol. Surv. Bull. No. 90. 



Day Ö, Mineral Resources of the ü States 1891. Ibid. 



Boys C, Quartz fibers. Washington, Sm. Inst. Rep. 1890. 315. 



Merrill 6, Handbook for the Departement of Geology in the U. S. 

 National Museum. Part. I. Geognosy — The materials of the 

 earth crust. Washington, Nat. Mus. Rep. 1890. 503. 



