THIRTY-THIRD CONGRESS, 1853-55. 577 



world, thus securing scientific co-operation, and often ah ex- 

 change of valuable researches and publications. Such rela- 

 tions exist with no less than three hundred and forty-two 

 foreign institutions, scattered over Sweden, Norway, Iceland, 

 Denmark, Russia, Holland, Germany, Switzerland, Belgium, 

 France, Italy, Spain, Portugal, Great Britain, Ireland, South 

 America, Mexico, and even Greece, Turkey, Africa, Asia, 

 and Van Dieman's Land. Lectures upon popular and scien- 

 tific subjects have been regularly delivered at the institution 

 during the sessions of Congress, and have been open to " all 

 men," free of charge. Original researches have been stimu- 

 lated, and many valuable memoirs upon scientific subjects 

 published and distributed to all the principal libraries and 

 learned societies in the world. To show conclusively what 

 has already been done in this direction, I will give a list of 

 some of the publications, premising, in the language of the 

 secretary of the board, that "the institution up to this time 

 has scarcely published a single paper the production of which 

 has not been stimulated and assisted, or whose character has 

 not been improved by the agency of the institution ; and, as 

 a whole, they are such as could not have been given to the 

 world without the aid of the Smithsonian bequest." They 

 are the products of American genius, and have reflected the 

 highest honor on American science: 



WORKS PUBLISHED BY THE SMITHSONIAN INSTITUTION. 



Quarto Volumes. 

 Smithsonian Contributions to Knowledge. ^ 1848. Vol. I, 4, pp. 346, with 



48 plates and 207 woodcuts. 

 Smithsonian Contributions to Knowledge. 1851. Vol. II, 4, pp. 464, and 



24 plates. 

 Smithsonian Contributions to Knowledge. 1852. Vol. Ill, 4, pp. 564, and 



35 plates. 



Smithsonian Contributions to Knowledge. 1852. Vol. IV, 4, pp. 426. 

 Smithsonian Contributions to Knowledge. 1853. Vol. V, 4, pp. 538, and 



45 plates. 



Smithsonian Contributions to Knowledge. 1854. Vol. VI, 4, pp. 476, and 

 53 plates. 



Mathematics and Physics. 



The Law of Deposit of the Flood Tide : its dynamical action and office 

 By Charles Henry Davis, Lieutenant United States Navy. 



Observations on Terrestrial Magnetism : By John Locke, M. D., M. A. 

 P. S. 



Researches on Electrical Kheometry : By A. Secchi. 



Astroriomy. 



Six Memoirs upon the Occulations Visible in the United States during 

 the years from 1848 to 1853, inclusive. Computed under the direction of 

 the Smithsonian Institution : By John Downes. 1848. 4, pp. 12. 

 Researches Relative to the Planet Neptune : By Sears C. Walker, Esq. 

 Ephemeris of Neptune for the Opposition of 1848: By Sears C. Walker, 

 Esq. 



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