May 4, 1868. 



Dr. Wislizenus, Vice-President, in the chair. 



Ten members present. 



Letters were read, and various foreign exchanges were laid 

 upon the table, by the Corresponding Secretary. 



Dr. Briggs exhibited a specimen of the Mayflower {Epigcea 

 repens) from New Hampshire, in bloom, a primrose (Dodeca- 

 theon) and a small fern {Camptosorus) from St. Clair county, 

 Illinois. 



Dr. Wislizenus reported as the result of his meteorological ob- 

 servations for March and April, that the mean temperature for 

 March (51.1 ) was much above the average, and that for April 

 (50.4 ) was far below it. Vegetation started, accordingly, much 

 earlier in March than usual, but was checked again by the cold 

 weather in the first half of April. The rain in these months very 

 much exceeded the average, being for March 7.67 inches, and for 

 April 7.85 inches. 



Mr. Holmes presented a specimen of the iron made at the new 

 Carondelet Furnace, in South St. Louis, with the bituminous coal 

 from the Big Muddy River in Illinois. It had been pronounced 

 to be of excellent quality. 



May 1 S, 1868. 



Dr. Wislizenus, Vice-President, in the chair. 



Five members present. 



The Corresponding Secretary laid upon the table No. 1 of vol. 

 i. of the Transactions of the Chicago Academy of Science, and 

 reported that No. 3 of vol. ii. of the Transactions of our Academy 

 had been issued, and copies duly forwarded to the various socie- 

 ties upon our exchange list. 



Dr. L. D. Morse, Commissioner of Statistics, presented a copy 

 of the "Missouri Statistics for 1867." 



Dr. O. H. Potter, having resigned the office of Recording Sec- 

 retary, Mr. Spencer Smith was elected to fill the vacancy. 



