229 



MINERALOGY. 



[In preparing abstracts of mineralogical papers it has been thought right to 

 adhere as far as possible to whatever system of nomenclature, chemical notation, 

 and crystallographic formulae may have been used by the authors. No attempt 

 has therefore been made to secure uniformity on these points. Where two or more 

 symbolical expressions for the same thing have been used, the first has generally 

 been taken. In some cases exceptions to the foregoing rules have been made to 

 avoid typographical difficulties.] 



Achiardi, Ant. d'. Sulla Cordierite nel Granito normale dell' Elba e 

 sulle correlazioni delle llocce grauitiche con le trachitiche. [On 

 Cordierite in the normal Granite of Elba, and on the Correlation of 

 the Granitic and Trachytic Rocks.] 12 pp., Pisa; also Zeitsch. 

 deutsch. f/eol. Ges. Bd. xxvii. Heft ii. pp. 462-464. 

 Announces the discovery of cordierite in a specimen of granite from 

 Monte Ca panne in Elba. The mineral occurs in dark brownish-green 

 imperfect crystals, elongated in the direction of the vertical axis, and ex- 

 hibiting principally the forms (3 1 0) and (0 1 0). Cordierite also occurs 

 in the Tuscan trachytes ; and the present discovery therefore furnishes 

 another bond between the granitic and trachytic rocks, already known 

 to have much in common. P. W. R. 



. Sulla Natrolite (Savite) e Analcima di Pomaja (Com. di Santa 



Luce). Atti ISoc. Tosc. Sci. Nat. Pisa, vol. i. fasc. 1, pp. 67-69. 

 The same as the paper noticed in the Geological Recoed for 1874, 

 p. 221. 



Akerman, R. Relations of Titanium to Iron. Iron, vol. vi. p. 450. 

 Contains notices of Swedish iron-ores. 



Andrews, Dr. T. On the Composition of an Inflammable Gas 

 issuing from below the Silt-bed in Belfast. Hep. Brit. Assoc, for 

 1874, Sections, pp. 50, 51. 



The same as the paper noticed in the GEOLOGiCiJ, Record for 1874, 

 p. 221. 



Anon. [G. H. Wollaston.] Catalogue of the Minerals in the Clifton 

 College Museum. Trans. Clifton Coll. Sci. Soc. vol. ii. pt. 1, 

 pp. 55-72 (Appendix). 

 The formula and locality of each specimen are given ; the greater 

 part are British. 



Rcctificacion acerca del Descubrimicnto de la nucva Especio 



mineral, Uamada por el Sr. Petersen, Guadalcazarita. [Discovery 

 of the New Mineral Species Guadalcazarite.'] NaturaUzUy t. iii. 

 no. 12, pp. 235-238. 

 The Mineialoi^ical Commission of the Mexican Society of Natural 



