Section 143. Management and appropriation of property

Trustees created
  under the  provisions  of  this  article  shall  have  the  custody  and
  management   of   all  the  property  of  such  corporation,  and  shall
  appropriate the same, so far as the terms, provisions and conditions  of
  the  donations  will  permit,  for the purpose of aiding and instructing
  children, or for providing suitable grounds for such a  public  park  or
  parks  and  properly preparing, beautifying, embellishing and keeping up
  and maintaining the same, or for furnishing and supplying  such  library
  with  a  suitable  and  proper  edifice,  rooms, furniture, books, maps,
  magazines and whatever may be necessary to make, keep up and maintain  a
  good  and  complete  library,  or  for one or more of such purposes, and
  paying the  expenses  of  the  trust.  Demising  lands  donated  to  the
  corporation  and  investing  and keeping money invested at interest, and
  using the rents  and  interest  therefrom  for  aiding  and  instructing
  children or for park purposes or library purposes, shall be deemed to be
  an appropriation of such property for said purposes.