Ixv 



Mr. E. A. Engler gave a lecture on Standard Time systems in 

 Europe, describing in particular the methods of distributing time 

 signals in London and Paris. 



Prof. J. K. Rees gave a short lecture on the proposed adoption 

 of standard time meridians in this country. 



On motion of Prof. Rees, the Academy voted unanimously to 

 endorse the plan of standard time meridians now being advocated 

 by the Metrological Society, and recommended that 6'^ o'" o^ 

 west of Greenwich be adopted as standard St. Louis time. 



Dr. W. G. Eliot, Chancellor of Washington University, was 

 elected to associate membership, and Carl Ritter von Hauer and 

 Dr. Hann, of Vienna, were elected to corresponding membership. 



June 6, 1881. 



Dr. Engelmann in the chair. Twelve members present. 



Dr. Stevens exhibited some specimens of sharks' teeth from the 

 phosphate beds of South Carolina. The phosphates from this 

 region are largely used as fertilizers, and contain large numbers 

 of sharks' teeth. 



Dr. Engelmann remarked that the past spring had been cool 

 in March, vegetation being considerably retarded. April had a 

 temperature nearly normal, while May was unusually warm, so 

 that now vegetation is about normally advanced. Fruit trees 

 bloomed later than usual, and all bloomed at about the same time. 



The Corresponding Secretary read a communication from Dr. 

 Sevftarth on the New York obelisk. 



June 20, 1 88 1. 



Dr. Engelmann in the chair. Eleven members present. 



The Corresponding Secretary read a letter from Dr. von Hoch- 

 stetter, acknowledging his election to corresponding membership. 



Dr. Engelmann presented a report on the climate of San Luis 

 Potosi, Mexico : 



The range of temperature on the high plateau upon which the city is 

 situated is small. In spring the temperature ranges from 32 to 80, and in 

 summer from 55 to 73. The annual rainfall is only twelve inches. 



iv — 3 — A [March 29, 1884. 



