159 Trans. N. ¥. Ac. Sci. 
ARTICLE X. 
By-laws, for the further regulation of the society, may 
from time to time be made.* 
ARTICUE <i: 
+ No alteration shall be made in this Constitution, unless 
by a vote to that effect of three-fourths of the fellows and 
three-fourths of the resident members entitled to vote under 
Article V. 
* See Section 2 of the Charter. 
+ This clause must be taken in connection with Section 5 of the Charter, 
which requires a previous request in writing of one-third of all the resident 
members, which must be considered in this case as including fellows, as that 
class of members was not in existence at the time the Charter was granted, sub- 
mitted one month previous to any vote being taken. 
