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XXI. The Home Secretary shall present to the Council 
estimates for books and stationery, binding, &c., required 
for the use of the Academy. 
OF THE PROPERTY OF THE ACADEMY. 
. The proper Secretary shall acknowledge all do- 
nations made to the Academy, and shall report them at the 
next stated session. 
XXIII. The books, apparatus, archives, and other prop- 
erty of the Academy shall be deposited in some safe place 
in the city of Washington. A list of the articles deposited 
shall be kept by the Home Secretary, who is authorized to 
employ a clerk to take charge of them. 
XXIV. A stamp corresponding to the corporate seal 
of the Academy shall be kept by the Secretaries, who shall 
be responsible for the due marking of all books and other 
objects to which it is applicable. 
Labels or other proper marks, of similar device, shall be 
placed upon objects not admitting of the stamp. 
OF CHANGES IN THE BY-LAWS. 
XXV. Any By-Law of the Academy may be amended 
or repealed on the written motion of any two members, 
signed by them, and presented at a stated session of the 
Academy ; provided the same shall be approved by a ma- 
jority of the members present at the next stated session. 
