65 [ 23 ] 



Grubbing and clearing . — All the sod, roots, and in general all vegetable 

 mould and perishable matter; shall be removed from the whole area cover- 

 ed by the building. 



And, in general, all excavation, refilling, grubbing, and clearing, neces- 

 sary to complete the building in every respect, will be performed by the 

 contractor, in accordance with the directions of the architect. 



Masonry in foundation — concrote. — Under all l^e walls of the building 

 a foundation course of concrete masonry, which shall be made by mixing 

 two parts of best hydraulic cement wilh one part of lime in paste, with 

 eight parts of clean sharp sand, which shall be thoroughly mixed and 

 well tempered, and nine parts of broken stone, not exceeding two and 

 a half inches in diameter. The whole shall then be thoroughly mixed, 

 and well tempered, and laid in courses of six inches, and shall be well 

 rammed, when laid, with a heavy maul, so as to insure the perfect solidi- 

 ty of the whole mass. 



The concrete shall belaid to the following dimensions, under the dif- 

 ferent parts of the building: 



A. — Under the two central front towers twelve (12) feet wide on bottom, 

 ten (10) feet wide on the top, and two (2) feet in thickness, under all the 

 walls and buttresses. 



B. — Under the central rear tower, and the campanile and octagonal 

 towers, ten feet wide on the bottom, eight feet wide on top, and two feet 

 in thickness, under all the walls and buttresses. 



U. — Under all the remaining towers, eight feet wide on the bottom, six 

 feet wide on the top, and one foot six inches in thickness. 



D. — Under the walls and buttresses of the central building, six feet 

 wide on the bottom, five feet wide on the top, and one foot in thickness. 



E. — Under the conneciing ranges and principal partition walls, four feet 

 six inches wide on the bottom, three feet six inches wide on the top, and 

 one foot in thickness. 



F. — Under the wings, five feet wide on the bottom, four feet wide on 

 top, and one foot in thickness. 



G. — Under the piers suppor;ing the clerestory columns of the gallery 

 of art, six feet six inches square on the bottom, five feet square on the 

 top, and two feet in thickness. 



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

 the lecture-room, five feet square on the bottom, four feet square on the 

 top, and one foot six inches in thickness. 



iStone masonry in foundation. — The masonry of the foundation shall 

 be laid of large, well shaped, gneiss building-stone, of the best quahty. 

 with level beds and builds, laid'in courses, with strong bond. The stones 

 shall be of large size, not less than three feet in length ; the beds shall be 

 hammered true and even, and the joints brought close together. All the 

 joints shall be filled com{)letely with mortar and spaulls, so as to leave no 

 cavities which might endanger the stability of the walls, and the outside 

 joints shall be well pointed. 



The foundation shall be laid of the fohowing dimensions of cross sec- 

 tioii, under the different portions of the building : ■ \ a 



A. — Under the central front towers, 1st, a course nine feet wide and 

 two feet thick ; 2d, a course seven feet wide and two feet thick ; 3d, a 

 course five and a half feet wide and two feet thick. 



B.— Under the central rear tower, and the campanile and octagonal 

 5 



