306 PROCEEDINGS OF THE AMERICAN ACADEMY. 



Laugiiages of the American Indians, with Demonstrations. 

 By J. Walter Fewkes. 



The following papers were presented by title : — 

 ^ On the Carpologic Structure and Development of the 

 Collemacete and Allied Groups. By W. C. Sturgis. 



Concerning the Structure and Development of Tuomeya 

 fluviatilis, Harv, By William A. Setchell. 



On the Extent of the Excursion of the Electrodes of the 

 Microphone Transmitter. By Charles R. Cross. 



Eight bondred and thirty-second Meeting. 



May 14, 1890. — Monthly Meeting. 



The President in the chair. 



The Corresponding Secretary read letters from Messrs. 

 Sherburne W, Buruham, Thomas M. Cooley, Timothy 

 Dwight, Frank A. Gooch, and William A. Rogers, acknowl- 

 edging their election as Associate Fellows ; from George E. 

 Ellis and Henry Willey, resigning Fellowship ; and from the 

 Secretary of the American Oriental Society, thanking the 

 Academy for the use of its hall. 



Major William R. Livermore presented a communication 

 on the Law of Gravitation at Molecular Distances, the object 

 of this paper being to call attention to the following proposi- 

 tion : — If the force which holds together the particles of a 

 solid body varies as the product of the masses and inversely 

 as the square of the distance, then the solid is not homoge- 

 neous, and its particles are not distributed uniformly through- 

 out the mass, but are collected in rows or lines. 



Professor Dolbear presented a short communication on the 

 subject of Vortex Rings. 



