236 MINERALOGY. 



General results of investigations on the thermo-electric properties of 

 topaz, barytes, and aragonite. 



Harrington, 13. J. Notes on Dawsonite, a new carbonate. Can. 

 Nat., N. S. vol. vii. no. 6, pp. 305-309. 



Dawsonite occurs in the joints of a trachytic dyke near the western 

 end of M'Gill College, Montreal, and is named after Principal Dawson. 

 Two original analyses are published ; and from these the author con- 

 cludes that Dawsonite " may be a hydrous carbonate of alumina, lime, 

 and soda, or perhaps a compound consisting of a hydrate of alumina 

 combined with carbonates of lime and soda." F. "W. H. 



Ha WES, George "W. Contributions from the Sheffield Laboratory of 

 Yale College. No. XX. On a Feldspar from Bamb, in Norway. 

 . Amer. Journ. ser. 3, vol. vii. p. 579. 



A triclinic felspar, occurring with fluo-phosphate of mag-nesia and 

 lime (Kjerulfine), when analyzed was found to agree nearly with 

 oligoclase. Its physical properties agree with those of Tschermakite. 



E. B. T. 



Hessenberg, Dr. F. N. Jahrb. Heft viii. pp. 817-853, woodcuts. 



An obituary notice of Dr. Hessenberg by Prof. Vom Rath, containing 

 unpublished notes of recent original researches, and notes on the 

 mineral collections of the Biitish Museum and the Museum of Practical 

 Geology, made during Hessenberg's visit to London in 1868. F. W. R. 



Hintze, Dr. C. Ueber die chemische Zusammensetzung des Lead- 

 hillit's. [Chemical composition of Leadhillite.] Pogg. Ann. Bd. 

 clii. pp. 26Q-2Q4:. 

 Concludes that the composition of this species is not PbSO^+ 3PbC03, 

 as generally expressed, but 2PbSO^+4PbC03 + PbO + 2H20. Main- 

 tains that the new mineral called Maxite is identical with Leadhillite. 



F.W.R. 



Hunt, Dr. T. S. Remarks on an occurrence of tin-ore at Winglow, 



Maine. Trans. Amer. Inst. Min. Eng. vol. i. pp. 373-375 (with 



discussion). 



The ore is cassiterite, in thin veins traversing micaceous limestone, 



subordinate to the gneissic series of the White-Mountain scries. 



. On Dr. Genth's Researches on Corundum and its associated 



Minerals. Proc. Best. Soc. Nat. Hist. vol. xvi. pp. 332-335. 



Ingunza, Ramon de. Algunas indicacioncs sobre la extraiia natu- 



. raleza de los Coprolitos de Terror en la Provincia de Zaragoza. 



Bol. Com. map. geol. Espan. vol. i. 



Refers to a deposit of coprolites found at Terror, in the province of 



Zaragoza. Analyzes and describes the coprolites. A lithographic plate 



represents their forms. J. M'P. 



Janovsky, J. V. Analyse eines Minerals von Orawicza. Ber. deutsch. 

 Chem. Ges.pp. 109, 110. 



