fill out forms requesting books brought to them from the library's closed stacks, which are delivered to the indicated seat numbers. Surrounding the room are thousands of reference works on open shelves along the room's main and balcony levels, which may be read openly. At the time of the library's opening, there were about 25,000 freely accessible reference works on the shelves. There are three levels of bookshelves: two on the main floor beneath the balcony, and one on the balcony. Above the top level of shelves is a duct carrying wiring and cables for the room. The walls are made of Caen stone and are designed to resemble limestone. Massive windows and grand chandeliers illuminate the space. There are eighteen grand archways, of which fifteen contain windows: nine face Bryant Park to the west, and six face east. The other three archways form a wall with the Public Catalog Room to its east, and the middle archway also contains windows that face into the Catalog Room. Each window contains low emissivity glass. There are two rows of nine chandeliers in the Main Reading Room, decorated with such details as satyr masks and acanthus leaves. These were originally fitted with incandescent light bulbs, an innovation at the time of the library's opening, and were powered by the library's own power plant. The lights on the chandeliers are arranged like an inverted cone, with four tiers of light bulbs. The plaster ceiling is supported on wire mesh, since there are no columns within the room. The ceiling is painted to emulate gilded wood, with moldings of classical and figurative details. The Klee-Thomson Company plastered the ceiling. According to Matthew Postal, the moldings include "scroll cartouches bordered by cherubs, nude female figures with wings, cherub heads, satyr masks, vases of fruit, foliate moldings, and disguised ventilation grilles." The moldings frame a three-part mural, created by James Wall Finn and completed in 1911. Though no clear photographs exist of the mural's original appearance, the mural in its present incarnation depicts clouds and sky. When the ceiling was restored in 1998, the original mural was deemed to be unsalvageable, and Yohannes Aynalem instead painted a reproduction. The ceiling was restored again from 2014 to 2016. Heating and ventilation grilles are embedded within the walls and ceiling. Public Catalog Room The Bill Blass Public Catalog Room, also located in Room 315, connects the McGraw Rotunda