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in the museum of the Institute, Eastern Parkway and Washington Avenue, 
shall be used by the Institute in carrying out its plan and purposes in estab- 
lishing, developing and maintaining a botanic garden and arboretum for 
the benefit of the residents of the City of New York 
Quittal and Surrender of Premises 
Twentietu.—That the said party of the second part may at any time 
after the expiration of three and before the expiration of six months of the 
date of the service of a notice in writing to the said party of the first part, 
its successor or successors, or to the Mayor of the City of New York, of its 
intention so to do, quit and surrender the said premises and remove all its 
property therefrom, except as hereinbefore provided; and upon and after 
such notice said party of the second part shall and will, at the expiration of 
said six months, quietly and peaceably yield up and surrender to the party 
of the first part, its successor or successors, all and singular the aforesaid 
demised premises, and it is expressly understood and agreed by and between 
the parties hereto that if the party of the second part shall omit to do, perform, 
fulfill and keep any of the covenants, articles, clauses and agreements, matters 
and things herein contained, which on its part are to be done, performed, 
fulfilled and kept according to the true intent and meaning of these presents, 
then and from thenceforth this grant and demise shall be utterly null and void. 
Conditions of Cancellation of Agreement 
Twrenty-rirst.—It is hereby expressly agreed that this contract may 
be cancelled and annulled at any time by the party of the first part, pro- 
viding the Board of Estimate and Apportionment of the party of the first 
part, its successor or successors, after notice in writing to the party of the 
second part served by mailing or otherwise notifying the party of the second 
part that some action is to be taken in reference to this agreement, by a vote 
of three-fourths of all its members by motion or resolution decides that it is 
for the best interests of the party of the first part that said contract be cancelled 
or annulled. And it is further agreed that upon said Board of Estimate and 
Apportionment aforesaid directing the cancellation or annulment of said 
contract, the party of the first part shall serve upon the party of the second 
part, or its successor or successors, or any officer thereof, a notice in writing 
notifying the said party of the second part of the action of the said Board of 
Estimate and Apportionment, and the said party of the second part shall 
thereafter, and before the expiration of six months after the date of the service 
of said notice in writing as aforesaid, notifying the party of the second part of 
the cancellation or annulment of the contract by the party of the first part, 
quit and surrender the said premises and remove all of its property therefrom, 
except as hereinbefore provided, and after such notice, said party of the 
second part shall and will at or before the expiration of six months, quietly 
and absolutely yield up and surrender to the party of the first part, its successor 
or successors, all and singular the aforesaid demised premises, and upon 
the failure of the party of the second part to remove from said premises all its 
property and surrender and quit said premises as aforesaid, within six months 
jor 
