162 [Dec. 4, 



inquiry into the natural laws lying at the basis of musical sounds. Prof. 

 Helmholtz permitted me to take part in his investigations, and at his 

 kind suggestion I attempted by myself, by means of the laryngoscope, to 

 observe the physiological processes that go on in the larynx during the pro- 

 duction of different tones. My special thanks are due to him that now, 

 with a more thorough knowledge of the human voice, I can give instruc- 

 tion in singing without the fear of doing any injury.' " 



Mr. Rosengarten presented to the Society the laryngoscope 

 used by Mrs. Seller, which was stated to be the first ever used in 

 America. At the conclusion of the memoir, the President 

 invited those present to a light collation that had been pre- 

 pared. 



And the Society was adjourned by the President. 



Stated Meeting, December 4-, 1891. 



Present, 11 members. 

 Mr. Richard Vaux in the Chair. 



Correspondence was submitted as follows : 



A letter of acceptance of membership from Prof. George 

 Forbes, London, November 1, 1891. 



A letter from the Coast and Geodetic Survey Office, Wash- 

 ington, D. C, asking for exchanges, which request was granted. 



The following were ordered to be placed on the Proceed- 

 ings Exchange List : 



Massachusetts Agricultural College, Amherst, Mass. ; Agri- 

 cultural Experiment Station, New Haven, Conn. ; Agricultural 

 Experiment Station, Lincoln, Neb. ; Agricultural Experiment 

 Station, College Park, Md. ; Agricultural Experiment Station, 

 Raleigh, N. C. ; Agricultural Experiment Station, Auburn, 

 Ala. ; Agricultural Experiment Station, Starkville, Miss. ; 

 Agricultural Experiment Station, Fayetteville, Ark. ; Agri- 

 cultural Experiment Station, Laramie, Wyo. ; Agricultural 

 Experiment Station, Providence, R. I. ; Agricultural Experi- 

 ment Station, Tucson, Ariz. ; Agricultural Experiment Sta- 



