428 PROCEEDINGS OP THE AMERICAN ACADEMY 



The following paj)ers were presented : — 



" Note on Grassmann's Calculus of Extension." By Mr. 

 C. S. Peirce. 



" On a New Form of a Dividing-Engine." By Professor 

 W. A. Rogers. A machine built for the phj'sical laboratory 

 of Princeton College was exhibited. 



" On the Determination" of the Chances at Billiards in 

 the Case of a ' Grand Discount.' " By Professor Benjamin 

 Peirce. 



Seven hundred and fifth Meeting. 



November 14, 1877. — Adjourned Stated Meeting. 



The President in the chair. 



Dr. Wyman, in behalf of the Ptumford Committee, asked 

 for an appropriation of one thousand dollars (81,000) from 

 the income of the Rumford Fund, to be exjDended under the 

 direction of the Committee on investigations in light and heat; 

 and this appropriation was made. 



Professor Watson presented to the Academy a volume 

 containing studies of certain inventions exhibited at the late 

 Centennial Exhibition, and also a study of engineering works 

 upon the river INIarne in France. 



On the recommendation of the Rumford Committee, it was 

 voted that the barometer belonging to the Academy should 

 be loaned to the Institute of Technology for meteorological 

 investigations. 



The following papers were presented : — 



'' On the Dimensions and Proportions of the Temple of Zeus 

 at Olympia." By Professor Charles E. Norton. 



" On the Possible Affinities of a Problematical Fossil from 

 the Carboniferous Rocks of Illinois." By Mr. S. H. Scudder. 



Professor Semper made some remarks on the inhabitants 

 of the Pelew Islands. 



Mr. Trouvelot presented, by title, the following papers : — 



" Undulations observed in the Light of Coggia's Comet of 

 1874." 



