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inches high; and for the reaiaiuder of the height, or nine feet, they will 

 be nine inches in thickness, and of tfie lengths shown on plans.' 



All the above brick masonry shall be laid with the closest possible joints, 

 especially in the arches, which shall be slated in the joints, and all the 

 fcricks shall be well wet before they are laid. Proper openings for doors 

 with semicircular arched heads turned over them, shall be built in the 

 walls, in the places shown on the plans, and where the architect shall direct. 



Arches of brick, of such dimensions as the architect shall direct, will 

 be turned behind all the stone arches of the windows and doors. 



The mortar for all the above brick masonry shall be composed of best 

 hydraulic or ground lime, 6r a mixture of hydraulic cement and lime in 

 paste, mixed with the best clean sharp sand, and throughly tempered. 



All the remaining stone and brick masonry necessary to complete the 

 foundation to be performed by builder, whether specified or not. 



WALLS OF BUILDING ABOVE FOUNDATION. 



Stone masonry. — The walls shall be faced with the best broken rub- 

 ble masonry, of white marble, or buff-colored Seneca stone of even color 

 and best description, or of granite similar to that in the rear of the Gen- 

 eral Post Ufiico; and the contractor will state in his estimate the ex- 

 pense of constructing the building with each of the three above described 

 materials. The face of the stone shall be brought to the square by the 

 mason's hammer, care being talcen to pick, as far as possible, such stones 

 for the face as will require little dressing ; the object being to preserve, as 

 far as practicable, the natural face of the stone, v/ith the crystals un- 

 broken. The beds, joints, and builds of the stone shall be dressed true 

 and even, so that the joints shall not exceed one half of an inch in the 

 widest place. The style of the front shall be either broken or angular 

 rubble, and the face shall be laid in the manner directed by the archi- 

 tect. The facing shall average ten inches in thickness, and no stone 

 will be allowed in the work whose breadth of bed is less than two-thirds 

 its height. The stone shall be of nearly uniform color, free from all 

 sap, iron pyrites, and all other discoloring or deteriorating material, and 

 especially in the white marble, from the decomposing carbonate of mag- 

 nesia. 



The face of the wall shall be strongly tied to the backing by head- 

 ers of the same material as the face, running in places through the 

 wall, and in no case less than twenty inclies in depth, and fur- 

 nished in such numbers as the architect shall direct— say one in every 

 three feet six inches square. All the arres of the buttresses, towers, 

 •&C., and all the corners, splays, and angles, throughout the whole build- 

 ing, shall be dressed with the chisel so as to be perfectly plumb, true, 

 and even, when laid. No quakers will be allowed in any part of the 

 work. All the stones shall be laid on their natural beds. The head- 

 ing stones on the comers of all the towers, buttresses, and of the 

 whole building, shall have beds at least equal to their heights on face. 

 The joints shall be pointed with a mixture of the best quicklime and 

 blacksmith's scales and sand, and shall be smooth struck on the face ; 

 and, after it has set throughout, the joints shall be painted to the color 

 of the face with the best Dure white lead and boiled linseed oil, colored 

 to the color of the stone. All the wails will be backed in with best 



