[23] 



72 



shall be colored different shades on the different parts of the walls, ceil- 

 ings, &c. 



Deafening. — All the floors which are not formed on groined ceilings, or 

 on iron beams with brick arches between them, will be deafened with a 

 mixture of lime, clay, and sand mortar, laid on of such thickness as the 

 architect shall direct. 



Iron work. — All the copings, cornices, battlements, window jambs and 

 mullions, sills, chimney caps, and in general all the stone work, etc., will 

 be tied together with strong wrought iron clamps, anchors, dowels and 

 rods, well leaded to the stone work, and of such dimensions as may be di- 

 rected by the architect. 



Wrought iron bars |-inch in diameter, and of the widths of the different 

 windows to the outside of the jambs, wilt be used where directed, to tie the 

 centre mullions to the jambs, especially in the octagonal story of the large 

 central tower, and in the greater and lesser octagonal, and the small square 

 towers of the central building. 



A bar of f by 2 inch wrought iron will be carried all around both stories 

 of the larger octagonal tower, and around the smaller octagonal, and the 

 small square towers of the central building, on a level with the spring line 

 of the arches of the windows. 



Gratings, of f by 1^ inch wrought iron, will be furnished for the areas 

 of the different towers. 



hi^luii'mg rods. — Five lightning rods, of wrought iron, one and a 

 half inch in diameter, will be furnished by the mason. They will be 

 furnished with elbows, glass thimbles, and platina points, of the best de- 

 scription, and will be put up in the foUownio^ places : one on the great 

 central front tower, one on the campanile tower, one on the octagonal 

 tower, one on the tower of the west wing, and one on the tower of the 

 chemical wing; and they will be carried ten feet above the tops of the 

 towers to which they are attached. 



Flagging. — The floors of the basement, of the chemical or east wing, 

 and its vestibule, and the east connecting range, shall be flagged w ith the 

 best North river flag, laid perfectly level, true, and even, and dressed in 

 the joints, and laid in at least 12 inches of clean sharp sand and gravel, 

 with at least six sess-pools, four feet in di£,meter and six feet deep, under 

 each of the above parts of the building. 



The cellars under the front towers, and the space between them, as well 

 as those of the central, rear, campanile, octagonal, and lower of the west 

 wing, will be similarly flagged. 



After the flag are laid, the joints will be grouted with a mixture of ce- 

 ment and sand. 



The floors of the two cloisters wih be flagged with best North riv^er flag, 

 axed perfectly smooth on the upper surface, and the stones will be of 

 equal size from two to three feet square, and laid diamond -wise in cement- 

 mortar. 



The floors of the two galleries of art, in the western wing and western 

 connecting range, will be flagged with the best North river flag, axed per- 

 fectly smooth, and cut to the form of octagons, of equal size, not more 

 than two feet in diameter. The squares between the octagons will be 

 filled with tiles of white marble or of red Seneca stone, as may be directed 

 by architect, and this will be laid in best cement and sand-mortar. 



