9 
the National Academy of Sciences to the best of his sca oe 
He shall also subscribe the laws of the Academy. 
Sect. 4. The members of the Academy shall be ar- 
ranged in two Classes, according to their special studies, 
viz.: A, the Class of Mathematics and Physics, and B, the 
Class of Natural History. The corporate members may 
select the Class in which they desire to be arranged. 
Sect. 5.* The members of the Classes shall arrange 
themselves in Sections, by inscribing their names under one 
of the following heads : — Ciass A. Mathematics and Phys- 
tes. Sections: 1. Mathematics ; ; 2. Physics; 3. Astron- 
omy, Geography, and Geodesy; 4. Mechanics; 5. Chemistry. 
Crass B. Natural History. Sections: 1. Mineralogy and 
Geology ; 2, Zodlogy ; 3. Botany; 4. Anatomy and Physi- 
ology; 5. Ethnology. 
But the Academy retains the power of transferring a 
member from one Section to another by a unanimous vote. 
Srcr. 6. A member of any Section may be elected 
a member of any one other Section by a vote of a majority 
of the members thereof present, subject to the approval of 
the Academy, but shall thereby acquire no new right of 
Voting as a member of a Class. 
The Academy may also, by a vote of three fourths of the 
Members present, appoint a member of any Section a mem- 
ber of any one other Section which is unable to elect for 
itself. Such member shall acquire no new right of voting 
48 4 member of a Class. 
Szcr. 7, The Academy may elect fifty Foreign Asso- 
Giates, who shall have the privilege of attending the meet- 
ings of the Academy, and of reading and communicating 
Papers to it, but shall take no part in its business, and shall 
Rot be subject to its assessments. 
* Amended January 4, 1865. t Amended August 25, 1865. 
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