" I >Ct. I. 



Dr. Konig promised to show in a coming memoir, efficient 

 for vri'v precise determinations. 



Prof. Houston desired to place on record an extension of 

 the researches of Prof. Thompson and himself, on Electric 

 Lighting, obtained by passing the Ruhmkorff discharge 

 through glass tubes containing silica, carbonate of ammonia 

 and similar substances. 



Trot'. P. E. Chase (detained from the meeting by illness) 

 presented, through the Secretary, a communication entitled 

 " Crucial Harmonies." 



Mr. Lesley exhibited several plates of the Permean fossil 

 plants discovered and described by Profs. Fontaine and 

 White of the West Virginia University, at Morgantown, in 

 the country west of the Monongahela River, and took occa- 

 sion to speak of the progress made by Prof, .lames Hall, Dr. 

 T. Sterry Hunt and others at the late Congress of Geologists 

 opened on the 29th of August last at Paris, in harmonizing 

 the geologies of Europe and America. He described the 

 meetings of the Congress, and the appointment of national 

 committees on classification and coloration, to report to Prof. 

 Capellini six months previous to the next assembling of the 

 International Congress of Geologists at Bologna in 1881. 



Mr. Lesley laid on the table for examination some quasi 

 coprolites, found by Mr. W. D. II. Mason in the roof slates 

 of the Mammoth bed, as described in a letter dated Williams- 

 town, July 20, 1878. 



Pending nominations 864 to 870 were read. 



Prof. Houston moved that the minutes on printed page 

 72S of No. 101 of the Proceedings be corrected. Owing to 

 the lateness of the hour, and at the request of the Secretary, 

 who reported the minutes, the subject was postponed for 

 consideration at the next meeting. 



And the meeting was adjourned. 



