442 
Donations for the Library were received from Gehe & Co., 
of Dresden, the Revue Politique, London Nature, the R. As- 
tronomical Society, Cambridge Museum of Comparative 
Zodlogy, Boston Society of Natural Sciences, Buffalo Young 
Men’s Association, Dr. Geo. B. Wood, Mr. Sol. W. Roberts, 
the Medical News, Penn Monthly, Petroleum Monthly, 
Wilmington Institute, and U. 8. Corps of Engineers. 
Professor Chase exhibited an annual Auroral Curve and 
explained its relations to the periodic maxima and minima of 
meteoric displays, &e. 
Professor Chase exhibited a drawing to illustrate the 
capacity of Mr. Holman’s pen to draw continuous lines of 
any length and thickness. 
Professor Chase then gave in tabular form, various recently 
calculated planetary relationships. 
Dr. Rodgers described his manner of obtaining an unlim- 
ited supply of electricity by the steam jet from a high- 
pressure boiler, not insulated, and in all weathers. 
This gave rise to a discussion of electrical phenomena / 
during voleanic eruptions and earthquakes. 
Pending nominations, Nos. 693 to 695, and new nomina- 
tion, No. 696, were read, 
And the meeting adjourned. 
Stated Meeting, June 21, 1872. 
Present, 8 members. 
Vice-President, Mr. Franny, in the Chair. 
Photographs for the Album were received from Dr, Ed. 
Jarvis of Dorchester, Mass., Dr. Elisha J. Lewis of Philadel- 
phia, and Judge W. H. Lowrie, of Meadville, Pa. 
A letter accepting membership was received from M. Léon 
Say, dated Paris, 10th May, 1872. 
Letters, acknowledging receipt of publications, were re- 
ceived from the Hungarian Academy, May 4, 1872 (XIIL, 
