444 Academy of Natural Sciences of PJiiladelphia. 



many and Italy, and promises to become of very great im- 

 portance. 



The additions to your library and museum have been very 

 great ; and among its benefactors, the Academy has still to 

 acknowledge with gratitude that its president, Mr. Maclure, 

 stands foremost. His unequalled munificence to this institu- 

 tion suffers him to lose no opportunity which his protracted 

 visited to Europe offers him, to enrich your library and col- 

 lections. 



The judicious measui'e adopted this year, by which the cu- 

 rators are authorized to exchange the duplicates, will, by re- 

 moving useless specimens and substituting new ones, lead to 

 the completion of the museum. 



Finally, the finances of the Academy are in an improving 

 condition. The report of the auditors, made this evening, 

 will show that the heavy debt, which has so long cramped our 

 efforts, has been at last extinguished, and tliat there remains 

 a small balance for investment, which, if judiciously stored 

 up, may become the foundation of a fund that will enable the 

 Academy to extend its usefulness. 



While our affairs are thus in a flourishing condition, we 

 may be permitted to feel some satisfaction at the success which 

 has attended our efforts, and to indulge the hope that, by per- 

 severing during the next year in the same course, we may 

 more extensively promote the interests of the noble cause in 

 which we are all so deeply interested. 



All which is respectfully submitted by 



William H. Keating, 



Philadelphia, Dec. 28, 1824. Recording Secretary. 



Appendix. — List of Lectures delivered before the Academy of 

 Natural Sciences during the year ending December 28, 1824. 



1. Proofs that the brain is the organ of the mind. 2. On 

 the power of animals to retain their internal natural tempera- 

 ture. 3. On the substances that enter into the composition of 

 animal bodies. — By Dr. Coates. 



4. On the dilatation and contraction of the heart. 5. Re- 

 view of White's gradation of animals. 6. Same subject con- 

 tinued. — By Dr. Darrach. 

 :'* 7. On comets, with a new theory to account for their na- 

 : ture, &c. — By Mr. Gilpin. 



8. On some late anatomical investigations. 9. On the ana- 

 tomical structure of the eye. — By Dr. Godman. 



10. On the influence of climate upon the geographical dis- 

 tribution of plants. 1 1. On classification in botany. — By Dr. 

 Griffith. 



12. On 



