viii Proceedings. 



Mr. E. M. Hasbrouck gave a communication on The Breed- 

 ing OF THE Bald Eagle near Mount Vernon, with an ex- 

 hibition of eggs. Comments were made by Messrs. John Bur- 

 roughs and Ward. 



Two Hundred and Ninth Meeting, 

 March 25, 1893. 



The President in the chair, and thirty-five members present. 



Dr. William C. Rives of New York was elected a corre- 

 sponding member. 



The President announced the death of Dr. George Vasey, 

 Botanist of the Department of Agriculture, and of Dr. Henry 

 Clay Nelson, United States Army, both memliers of the 

 Society. On motion by Mr. Walcott, it was voted to appoint 

 some member to present a Inographical sketch of Dr. Vasey. 

 The President a})}K)inted Mr. Coville. 



L. M. McCormick presented a paper on A Hybrid Between 

 Pyranga rubra and Pyranga erythromelas.* The paper 

 was discussed by Messrs. Howard and McCormick. 



Prof. E. W. Doran read an article on the Development 

 OF the Intestines of Tadpoles. Remarks were made upon 

 the subject by Messrs. Dall, Riley, and Reyburn. 



Dr. Theobald Smith addressed the Society on The Bac- 

 teriology OF Potomac Water and its Bearing upon San- 

 itary Problems. This paper gave rise to a long discussion, 

 in which Messrs. Lucas, Dall, Reyburn, Howard, Waite, 

 Riley, and Smith participated. 



Two Hundred and Tenth Meeting, 



April 8, 1893. 



Dr. C. Hart Merriam in the chair, and twenty-five persons 

 present. 



*The Auk, Vol. x, pp. 302-303, July, 1893. 



