J^eis-York Lyceum of Natural History. 387 



26. No diurnal variation of the needle at the equator,'-^ 

 M. Arago has, we understand, deduced fromM. Duperry's ob- 

 servations on the diurnal variations of the needle, that there 

 is no diurnal variation at the earth's equator. 



27. Increase 171 the quantity of rain. — M. Flauguergues of 

 Viviers, who has for 47 years carefully observed the quan- 

 tity of rain that fell, has remarked, by taking periods of ten 

 years, that the quantity of rain is continually increasing, and 

 also the annual number of rainy and cloudy days, not only at 

 Viviers but throughout the south of France. 



2d. Potassium and Sodium. — Mr. Frederick Butz of Niorj 

 (Canton de Vaud) in Switzerland, manufactures potassium 

 and sodium for sale, ■he price of potassium is L2 per ounce 

 and that of sodium L4 per ounce. 



Schweigger''s Journal, X. p, 494. 



II. Domestic. 



I. American Geological Society. — A. copy of the Vindiciae 

 Geologicje of Professor Buckland, forwarded to the Society 

 hy the author, has been received. 



Dr. J. Porter has presented to the Society, the New-York 

 Medical and Philosophic al Journal, in fhree Volumes octavo 

 — also several pamphlets. From the same gentleman, an 

 additional collection of minerals, in six boxes, has been re- 

 ceived. 



2. Proceedings of the Lyceum of JVatural History of New- 

 York; (continued from Vol. VII p. 174.) 



June 16. 1823. — Mr. A. Halsey read a synoptical view of 

 the Lichens growing in the vicinity of the city of New York. 

 Vide Annals o(th. Lyceum of Natural History of New-York. 



June 23. — Mr. Barnes communicated a supplement to a 

 former paper on the Chitons brous,ht from Peru by Capt. 

 Ridgely of thelT. S. Navy. 



June 30. — The President announced the fact of his having 

 received several bones of the Mastodon from Southold, 

 Long-Island, near the sea. Dr. Akerly communicated draw- 



