MINERALOGY. 263 



Villada, M. M. El Tequezquite. Estudio del Sr. D. Manuel Montaiio 



llamiro, publicado en el Aiio de 1870, como tesis para su Examen 



profesional de Eannacia ; dispuesto bajo un Orden distinto y con 



algunas Ampliacioncs. [Tequezquite ; a Thesis by Sen. D. M. 



Montano Ramiro in 1870.] Naturaleza^ t. iii. nos. 12, 13, pp. 



239-246. 



Tequezquite is a corruption of the Mexican TequLvqidtl, meaning 



<' something like a stone." It is a mineral substance consisting of a 



mixture of salts, especially carbonate of soda and chloride of sodium, 



the natural production of several lakes in Mexico. F. W, II. 



Voelcker, Prof. A. On the Chemical Composition of Phosphatic 

 Minerals used for Agricultural Purposes. Journ. R. Agric, Soc. 

 ser. 2, vol. xi. pp. 399-435. (Supplementary to a paper in vol. xxi.) 

 Gives analyses of " Coprolites " from various districts : — Frenchy 

 from near Boulogne [U. Greensand] ; Bellegrand, in valley of the Rhone ; 

 and Department of the Lot (Bordeaux Phosphate), liussian. Depart- 

 ment of Koursk. Cambridge [U. Greensand] ; Bedfordshire [L. Green- 

 sand] and Phosphatic Wood. Welsh, from Llandeilo Beds atCwmgynen. 

 Canadian. Sj^anish, from Caceres and Montanchez. Nassau (Staffelite). 

 Charlestown (geological notes from Prof. Tuomey and Dr. Pratt). 

 JSombrera, Navassa, St. Martin^ Windward Isles. Aruba, Leeward 

 Isles. Bedonda. Alta Vela, St. Domingo. W. T. 



Weishach, Dr. [Mineralogical Notes.] N. Jahrb. Heft vi. p. 627. 



Calls attention to the fact that the growth of quartz with calcite at 

 Schneeberg, in Saxony, described by Frenzel [p. 241] was well known 

 to the Freiberg mineralogists. Complains that Sandberger in describing 

 Clarite [p. 257] makes no allusion to Weisbach's Luzonite. F. W. It, 



. Synopsis Mineralogica : systematischc Uebersicht des Mineral- 



reiches. Pp. 78. 8vo. Freiberg. 

 The following classification of minerals is employed in this synopsis 

 (retaining the German forms of the group-names) : — I. Hydrolite (Salts) 



II. Zi^/j6 (Stones), — l.Kuphoxyde, 2. Pyritito (Silicates), 3. Apyritite, 



III. Metallite (Ores), — 1. Halometallite, 2. Metalloxyde, 3. Metalle, 

 4. Thiometallite. IV. Kauste (Combustibles), — 1. Thion, 2. Anthracite, 

 3. Asphaltite, 4. Retinite, 5. Paraffine. . F. W. R. 



Wiik, F. J. Mincralogiska och petrografiska meddelanden. [Min- 

 eralogical and Petrological Contributions.] See also p. 224. 



Describes several scrpentinous and chloritic minerals from Lupikko 

 and Orijaervi, in Finnland, including raotaxoite, picrofluite, marmoliiu, 

 scotiolite, and hisiugerito. F. W. R. 



Willcox, Joseph. On Samarskitc. Proc. Ac. Nat, Sci. Philadel. 



pt. ii. p. 26:3. 

 Found a specimen in N. Carolina weighing 20 pounds. 



