Catalogue of the Birds of Connecticut. 249 



2d. When solids or coagulable substances are submitted for ex- 

 amination, the addition of dilute hydrochloric acid is recommended 

 as the most promising means of dissolving out the arsenious acid. 



3d. Copper strips should be added until no stain is produced 

 after thirty minutes' ebullition. 



4th. Antimony and mercury are the only probable sources of 

 embarrassment. The first is separated from the mixed precipitate 

 by never raising the heat to 800° Fah. Large quantities of mer- 

 cury are first removed by the action of copper alone ; and when 

 it is mixed with arsenious acid in the sublimate, the solution of 

 the acid by pure water separates it from the metallic globules. 



5th. The simplicity of the manipulation and the certainty of 

 the result, are exceedingly strong recommendations. But the 

 facility with which a large number of examinations can be made 

 with only a small quantity of matter, is the most valuable fea- 

 ture of the process. If all the operations are conducted in small 

 tubes, an ounce of the suspected fluid will be sufficient to yield 

 ten or more portions of sublimate. 



6th. All the difficulty and loss of collecting common precipi- 

 tates are removed by using the test, and it is liable to fewer 

 sources of failure than those already known. 



In view of these advantages, Riench's test is recommended to 

 the profession as a valuable contribution to toxicology. 



Prince Edward Court House, Va., November 9, 1842. 



Art. III. — A Catalogue of the Birds of Connecticut, arranged 

 according to their natural families ; prepared for the Yale 

 Natural History Society, by Rev. James H. Linsley, A. M., 

 Member of the Conn. Acad, of Arts and Sciences, of the Yale 

 Nat. Hist. Soc, of the Boston Soc. of Nat. Hist., &c. 



[Communicated to the Yale Natural History Society.] 



In the " Catalogue of the Mammalia of Connecticut," publish- 

 ed in Vol. xnn, of the American Journal of Science, I proposed 

 to furnish next, for the Society, a list of the birds, which I now 

 have the pleasure to transmit for the consideration of that body. 

 I would beg leave to remark, that most of the birds herein named 

 have been obtained in Stratford, Connecticut, and its vicinity, 

 and are now in my cabinet. In comparatively few instances, 



Vol. xliv. No. 2.— Jan.-March, 1843. 32 



