124 [August, 



The chlorides were weighed together, dissolved in water, and on the addition 

 of bichloride of platinum evaporated to dryness, and the rennaining double salt 

 of bichloride of platinum and potassium extracted by alcohol. This salt was 

 heated to redness (as its quantity was very small,) and the platinum separated 

 by water from the chloride of potassium. From the quantity of platinum, that 

 of potash and chloride of potassium was calculated, and the latter subtracted 

 from the whole amount of alkali-metals. The difference is the weight of 

 chloride of sodium and lithium, but their quantity is too small for a correct 

 analysis. From reactions it was supposed that the mineral contained about 

 equal proportions of those. Fluorine and phosphoric or boracic acid could not 

 be detected. 



ELECTION. 



Mr. James L. Claghorn, of Philadelphia, Mr. George M. Keim, of 

 Reading, Pennsylvania, and Dr. G. Bischoff, of the same place, were 

 elected Members ; and 



Dr. Henry G. Dalton, of Demerara, was elected a Correspondent 



August Sd, 

 Vice-President Bridges in the chair. 



A communication from Prof. S. F. Baird was read, stating that the 

 Vulpes Utah, of Audnbon and Bachman, described in the last No. of the 

 Proceedings (for May and June) is identical with the F. macrourusy 

 Baird, described in Capt. Stansbury's Report of the Exploration of Utah. 

 As this Report was published early in June, the writer claims priority 

 of date for the latter name. 



Dr. LeConte read a paper intended for publication in the Proceedings, 

 entitled " Remarks on the Coccinellidae of the United States," which 

 was referred to Dr. Watson, Dr. Hallowell and Mr. Kilvington. 



Dr. LeConte reud a second communication, also intended for publi- 

 cation, entitled '^ Description of a new species of Trombidium." Referred 

 to the same Committee. 



August 10 til. 

 Vice-President Bridges in the Chair. 



A letter was read from Dr. J. P. Heister, for Dr. Bischoff of Read- 

 ing, Pennsylvania, dated August 5th, 1852, acknowledging the receipt 

 of the notice of election of the latter as a member of the Academy. 



A circular was received from Mr. Francis S. Holmes, Curator of the 

 Museum of Natural History in the College of Charleston, dated July 

 1852, giving an account of the establishment of the Museum, and re- 

 questing the transmission of duplicate specimens in exchange, and the 

 publications of the Academy ; and also offering to present a specimen of 

 a recent Crinoid from the coast of South Carolina. 



The communication was referred, on motion, to the Curators. 



A letter was read from the Secretary of the Linnean Society of Lon- 

 don, dated June 23d, 1852, acknowledging the receipt of the last No. 



