Ix Trans. Acad. Sci. of St. Louis. 



valued at $104.00 a carat. The colors vary — most of them being white, 

 brown and yellow, though one blue diamond has been found and sev- 

 eral black ones. 



From these indications this area seems to contain a mass of rock 

 similar to the rock in South Africa. But as to the number of dia- 

 monds which may be found deeper in the peridotite, that, said Pro- 

 fessor McCourt, is a question which can only be settled by actual 

 mining and testing. The results which have been shown by the more 

 or less spasmodic exploitation, however, seem to indicate a good 

 promise. 



Professor Niplier reported progress in his experiments 

 on "Momentum Effects in Electric Discharge." 

 Dr. Jesse S. Meyer was elected to membership. 



June 7, 1909. 



President Trelease in the chair; attendance 25. 



Professor W. E. McConrt exhil)ited a number of j)hoto- 

 graplis taken in the Onondago Cave, near Leasburg, Mo., 

 and described the formations found there. 



Professor F. E. Niplier gave a verbal account of some 

 of his recent work on electric discharge, stating that his 

 paper on the subject has not yet been completed. 



The death of Dr. Joseph Spiegelhalter, a former Vice- 

 President of the Academy, was announced, and the Presi- 

 dent appointed Prof. F. E. Nipher, Dr. Gustav Baum- 

 garten, and Dr. Adolf Alt a committee to draft a me- 

 morial. 



The following were elected to membership: Charles 

 Edwin Bessey, Lyster H. Dewey, Eeginald R. Gates, 

 Francis Ernest Lloyd, D. T. MacDougal, Andrew Meyer, 

 Jr., C. J. Pennock, B. Shimek, John K. Strecker, Jr., 

 Herman Tuholske. 



October 18, 1909. 



President Trelease in the chair ; attendance 90. 



Professor R. J. Wallace, late of the Yerkes Observa- 

 tory, presented for discussion "The Physical Possibili- 

 ties and Limitations of 'Autocrom' Color Photography."^ 



The following resolutions were presented : 



In the death of Dr. Joseph Spiegelhalter on June 7, 1909, the 

 Academy of Science of St. Louis has lost one of its oldest and most 

 valued members. 



