1»8 ♦ KEPORT OF THE SECEETARY. 



the following articles: A eulogy on Professor Alexander Dallas Bache, 

 late Superintendent of the Coast Survey, and president of the National 

 Academy of Sciences, prepared by Professor Henry at the request of 

 the Board of Eegents of the Smithsonian Institution ; a lecture on 

 Switzerland, by Professor Bache,to illustrate his style, with notes, bring- 

 ing the subject down to the present time, by Jno. Hitz, esq., consul 

 general of that country ; on a physical observatory, by Professor 

 Henry ; memoirs of Arago, Sir John Herschel, Henry Gustavus Mag- 

 nus, Professor Chester Dewey ; an original article on the nature 

 and origin of force, by W. B. Taylor, of the United States Pateut- 

 Oflice; a discourse on induction and deduction, by Liebig; an address 

 on the relations of food to work and its bearing on medical practice 

 by Eev. Samuel Haughton, of Dublin ; a lecture on hydrogen, by Dr. J. 

 E. Eeynolds ; a lecture on the identification of the artisan and artist, by 

 Cardinal Wiseman ; the diamond and other precious stones, translated 

 from the French of M. Babinet; a large number of original communica- 

 tions on ethnology, physics, and meteorology. 



The following are the rules which have been adopted for the distribu- 

 tion of the publications of the Smithsonian Institution : 



1st. To learned societies of the first class which present complete 

 series of their publications to the Institution. 



2d. To libraries of the first class which give in exchange their cata- 

 logues and other publications ; or an equivalent, from their duplicate 

 volumes. 



3d. To colleges of the first class which furnish meteorological observa- 

 tions, catalogues of their libraries and of their students, and all other 

 publications relative to their organization and history. 



4th. To States and Territories, provided they give in return copies of 

 all documents published under their authority. 



5th. To public libraries in this country, not included in any of the 

 foregoing classes, containing 10,000 volumes, and to smaller libraries 

 where a large district would be otherwise unsupplied. 



6th. To institutions devoted exclusively to the promotion of particular 

 branches of knowledge are given such pmithsoniau publications as 

 relate to their respective objects. 



7th. The Reports are presented to the meteorological observers, to con- 

 tributors of valuable material to the library or collections, and to per- 

 sons engaged in special scientific research. 



Exchanges. — The system of international exchanges has been largely 

 increased in extent and efficiency during the past year. The number of 

 foreign establishments to which the Smithsonian and other publications 

 are distributed, and from which returns are received, now amounts to 

 nearly two thousand. The system includes not only all the first-class 

 libraries, and societies of established reputation, but also a considerable 

 number of the minor institutions of the Old ^Yorld. The following 



