128 



Catalogue of the Officers and Students of Dartmouth College. 



1841-42. — From Professor Hubbard. 

 Charter and Laws of the Philadelphia Museum Company. 1840. — 



From the Company. 

 Reports on the Receipts and Expenditures of the County of Philadel- 

 phia, made by a Committee of the County Board, 13th Sept. 



1841. — From Mr. Yaughan. 

 Professor Dunglison's Introductory Lecture to a Course of Institutes 



of Medicine, &c. in Jefferson Medical College, 1st Nov. 1841. 



Published by the Class. — From the Author. 

 Professor Meigs's Introductory Lecture to a Course on Obstetrics, in 



Jefferson Medical College, 4th Nov. 1841. Published by the 



Class. — From the Author. 

 Two Sermons on the Death of the Rev. Ezra Ripley, D.D. By Rev. 



Barzillai Frost and Rev. Convers Francis, D.D. Boston, 1841. 



From Rev. Mr. Frost. 

 The American Library and Intelligencer. New Series. Vol. I. 



No. 5. By Robley Dunglison, M.D. &c. &c. Nov. 1841.— 



From the Author. 



FOR THE CABINET. 



A Painting emblematic of the Union of the American States, execu- 

 ted 1784. — From Mr. Wm. Amies. 



A Broad Sheet Copy of the Resolution of the Continental Congress, 

 passed 14th January, 1784; authenticated by the autograph of 

 Charles Thomson, Secretary. — From the same. 



The Committee, consisting of Mr. Lea, Dr. Wood, and Pro- 

 fessor Booth, to whom Mr. Nuttall's communication was re- 

 ferred at the last meeting, reported in favour of its publication 

 among the Transactions; and it was ordered accordingly. 



Mr. Espy exhibited an instrument, devised by himself, and 

 which he calls the Nephelescope, intended to show the changes 

 induced in the temperature of air by its greater or less rarefac- 

 tion; and made several experiments with it in the presence of 

 the Society. 



Mr. Espy showed, that he was enabled by this instrument to deter- 

 mine the reduction of temperature, which air undergoes by expansion, 

 whether in a dry state or when charged with moisture. He called 

 attention to the cloud which was formed in moist air by the cold of 

 expansion, and remarked that the latent heat evolved by this conden- 



