10 PROCEEDINGS OF THE AMERICAN ACADEMY 



Professor Eustis gave a new demonstration of the property 

 of the ellipse, that the snbtangent is independent of the con- 

 jngate axis. He showed that this led to a more simple con- 

 struction than any other given. 



Three hundred and sixty-sixtli meeting. 



July 26, 1852. — Adjourned Monthly Meeting. 



The President in the chair. 



The Corresponding Secretary presented a paper from Dr. 

 Leidy of Philadelphia, upon the Osteology of the Hippopota- 

 7md(B. 



Professor Peirce continued his remarks upon the forms as- 

 sumed by an elastic sac containing fluid, and stated that he 

 had succeeded in reproducing them artificially by the use of 

 gum, the force of gravity being eliminated, as in Plateau's ex- 

 periments, by immersing the gum in a mixture of alcohol and 

 water of the same specific gravity. 



Three hnndred and sixty-seventh meeting. 



August 10, 1852. — (Quarterly Meeting. 



The President in the chair. 



Dr. Pierson offered a tribute to the memory of the late 

 Thomas Cole, Esq., a Fellow of the Academy ; after a sketch 

 of Mr. Cole's life and labors, he offered the following resolu- 

 tions, which were unanimously adopted : — 



" Resolved^ That the Academy deplores, in the death of its late 

 Fellow, Thomas Cole, Esq., of Salem, the loss of a valuable and 

 active associate, whose simplicity of mind, sincerity of heart, and in- 

 tellectual acquirements, the result of years of persevering industry, 

 peculiarly fitted him for scientific pursuits, and acquired for him a 

 cordial regard from all who knew him. 



" Resolved, That the Academy sincerely condole with his bereaved 

 family in the affliction occasioned by his sudden decease. 



" Resolved, That a copy of these resolutions be transmitted to the 

 family of the deceased." 



