1870.] Presents. 311 



Transactions (continued). 



Royal Agricultural Society. Journal. Second Series. Vol. VL Part 1. 

 8to. London 1870. The Society. 



Melbourne : — Royal Society of Victoria. Transactions and Proceedings. 



Vol. IX. Parti. 8vo. Melbourne 1868. The Society. 



Philadelphia : — Academy of Xatural Sciences. Journal. New Series. 

 Tol. VI. Part 4. Vol. YJLi. (Leidy's Extinct Mammalian Fauna of 

 Dakota and Nebraska.) 4to. Philadelphia 1869. Proceedings, 

 1869. Xos. 1, 2. 8vo. Philadelphia. American Journal of Con- 

 chology. Yol. Y. Parts 1,2. 8vo. Philadelphia 1869-70. 



The Academy. 



Haidinger (YT. v., For. Memb. R. S.) Ein vorhomerischer Fall von zwei 

 Meteoreisenmassen bei Troja, 1864. Der Meteorit von Goalpara in 

 Assam, nebst Bemerkungen iiber die Rotation der Meteoriten in ihrem 

 Zuge, 1869. Bemerkungen zu Herrn Dr. Stanislas Meuniers Xote 

 iiber den Yictorit oder Enstatit von Deesa, 1870. Review of the 

 Royal Society Catalogue of Scientific Papers, 1870. 8vo. Vienna. 



The Author. 



Miers (J., F.R.S.) Contributions to Botany, Iconographic and Descrip- 

 tive, detailing the characters of Plants that are either new or imper- 

 fectly described. Yol. II. 4to. London 1860-69. The Author. 



Zantedeschi (Fr.) Delle Oscillazioni calorific-he orarie, diurne, mensili ed 

 annue del 1867. 8vo. Venezia 1870. The Author. 



April 7, 1870. 



Dr. WILLIAM ALLEN MILLER, Treasurer and Yiee-President, 



in the Chair. 



The following communications were read : — 

 I. " On Supra-annual Cycles of Temperature in the Earth's Surface- 

 crust." By Prof. C. Piazzi Smyth, F.R.S. Received March 

 4, 1870. 



(Abstract.) 



The .author presents and discusses the completely reduced observation?, 

 from 183/ to 1869 inclusive, of the four great earth-thermometers sunk 

 into the rock of the Calton Hill, at the Royal Observatory, Edinburgh, 

 by the late Principal Forbes, pursuant to a vote by the British Association 

 for the Advancement of Science. 



Leaving on one side the several natural-philosophy data which have 

 been investigated from smaller portions of the same series of observations 



VOL. XVIII. 2 B 



