[ 23 ] 66 



towers, 1st, a course of stone seven feet wide and two feet thick ; 2d5 a 

 course of stone five feet wide and two feet thick. 



C. — Under all the remaining towers, 1st, a course of stone five feet 

 wide and two feet thick ; 2d, a course of stone four feet wide and two feet 



thick. 



D. Under all the walls of central building, 1st, a course of stone four 



feet and a half wide and two feet thick ; 2d, a course of stone three feet 

 eight inches wide and one and a half foot thick. 



E. — Under the connecting ranges and principal partition walls, the 

 foundation will be three feet six inches wade, and four feet six inches in 

 height. 



F. — Under the wings, 1st, a course four feet wide and two feet thick ; 

 2d, a course three feet six inches wide and two feet six inches thick. 



G. — Under the piers supporting the clerestory of the gallery of art, a 

 foundation of stone four feet square on the bottom, two feet six inches 

 square on the top, and three feet in height. 



H. — Under all the remaining piers, for the columns of library, lecture- 

 room, &c., a foundation two feet square, and three feet six inches in thick- 

 ness. 



I. — Under all the remaining partition walls a course of long stone, 

 three feet six inches in length, and not less than eight inches in thicknesSj 

 will be laid. 



Under all the porches and buttresses, the foundation will be of the same 

 section and materials as the walls they are connected with, and they will 

 be well bonded to them. Ail the remaining stone work necessary to com- 

 plete the foundation, will be performed; areas and coal slides will be built 

 to all the openings to the furnace cellars, in tlie towers, and to the base- 

 ment windows, of such dimensions as may be directed by the architect. 

 Tlie faces of the w^alls will be well hanmier-dressed, and neatly pointed. 



The mortar for all the above stone foundation walls shall consist of the 

 best hydraulic lime and clean sharp sand, mixed in the best proportions, 

 and thoroughly tempered. 



Brick masonry in foundation. — Inverted arches, of the best hard brick, 

 will be turned under all the openings of the foundation, of the thickness 

 of the walls in which they are placed, atid of such otlier dimensions as 

 the architect shall direct. The arches will be laid in the most true and 

 even manner, with very close joints, which will be well slated up, to pre- 

 vent all settlement in the mortar. 



Groined arches of the best hard brick, laid in the best manner, with 

 close joints, the T-key courses being grouted up and slated, will be turned 

 under the two central front towers, and space between them, the central 

 rear tower, the campanile and octagonal towers of the main building, and 

 the tower of the west wing. The arches will be nine inches, or one brick 

 thick, and will be backed over with spandrils and haunch walls, aiid the 

 floors above them will be of best North river flag, axed smooth on the up- 

 per surface, and cut true and even in the joints. 



Partition walls. — Tlie main partition walls of the central building will 

 be of stone, in the foundation as above described. The lesser partition 

 walls, for the rooms in the connecting ranges and wings, will be laid up 

 of the best hard brick, and of the following section: 1st, a course of bricks 

 IS.inches wide, 5 inches high; 2d, a course of bricks 14 inches wide, 5 



