PONCE.- The National Endowment for the Humanities, under its Sustaining Cultural Heritage Collections program, has approved the Museo de Arte de Ponces proposal for the purchase and installation of a high-density mobile storage unit that will store and protect the museums collection of 1,259 three-dimensional art works. The grant is in the amount of $149,800. The Museo de Arte de Ponce, the only institution in Puerto Rico to receive a grant of this kind this year, thus moves to the vanguard in archival systems for three-dimensional objects. This system allows deposit space to be maximized while at the same time offering greater protection against natural phenomena such as earthquakes, since the unit immediately seals itself and thus helps prevent objects from falling and breaking. The museums extensive collection of 1,259 three-dimensional art works includes pieces in wood, ceramics,