344 



of the filter. To cleanse the common sand filter, he re- 

 commended that the filter box be filled with a solution of 

 soda or potash, corked, and allowed to stand a few hours; 

 the operation to be repeated two or three times if neces- 

 sary. 



Dr. Hayes recommended the employment of the large 

 stone filters, in which the sponge is cleansed every day. 



DONATIONS TO THE MUSEUM. 



January 2d. A specimen of Flying Fish, and some marine animals and 

 plants; by Gen. Samuel Andrews. 



February 20th. A specimen of Mistletoe growing upon the oak ; by Dr. Henry 

 Bryant. Fossil Shells ; by Master Edward Renouf. 



BOOKS RECEIVED DURING THE QUARTER-ENDING MARCH 31, 1856. 



Proceedings of the Yorkshire Philosophical Society. 8vo. Vol. I. London, 

 1855. From the Yorkshire Philosophical Society. 



History of the Condition and Prospects of the Indian Tribes in the United 

 States. 4to. Vol. 5. Philadelphia, 1855. Frovi the Commissioner of Indian 

 Affairs. 



Proceedings of the American Antiquarian Society. 8vo. Pamph. Boston, 

 1855. From the Association. 



Salmonidse. No. 1. By A. C. Hamlin, M. D. Bangor, Me. 8vo. Pamph. 



1855. From S. Kneeland, Jr. 



Description of some new Fossil Shells from the Tertiary of Petersburg, Vir- 

 ginia. By Henry C. Lea. 4to. Pamph. Philadelphia, 1856. From the Author. . 



Observations on Binocular Vision. By Prof. Wm. B. Rogers. 8vo. Pamph. 

 New Haven, 1856. From the Author. 



The Physical Atlas of Natural Phenomena. Plate 12. The Arctic Basin, its 

 limits, &c. By Prof. H. D. Rogers. From, the Author. 



Memoir of Thomas Haudasyd Perkins. By Thomas G. Gary. 8vo. Boston, 



1856. From the Author. 



Histoire Naturelle des Oiseaux d'Afrique. By Fran9ois Levaillant. 6 Vols. 

 Folio. Paris, 1799. Received from the Executors of the Estate of James Brown, 

 in exchange for other works bequeathed by Mr. Brown. 



