32 UNITED STATES NATIONAL MUSEUM 



latter leads to a platform 65 feet 6 inches wide, and varying in depth 

 from 12 feet 4 inches in the middle to 3 feet 7 inches at the ends, its 

 outer edge being the arc of a circle of large radius. The step below 

 the platform is 18 inches wide and concentric with it. , 



The total height of the pavilion from the bottom of the outer step 

 of the approach to the top of the parapet wall is 83 feet 2 inches. 

 The walls of the central recessed part are 6 feet 9 inches thick in the 

 ground story, and 2 feet 9 inches thick behind the columns in the 

 second and third stories. The thickness of the front and side walls 

 of the flanking pavilions in the ground story is 3 feet 6 inches and 

 3 feet 2f inches, respectively. 



COURT WALLS 



The walls of the two courts are alike, being faced with a gray- 

 white semi- vitreous brick in combination with gray Woodstock gran- 

 ite, having a 4:-cut surface. They are backed with red brick the same 

 as the outer walls. The distribution of the granite is as follows: 

 There is a base course 4 feet 3 inches high, exposed to a height of 3 

 feet 10 inches above the grade of the courts, the top of which forms 

 the sill line for the ground story windows. The arch of these win- 

 dows has a granite keystone, which is followed by a water table coutse 

 and a sill course for the first story, the latter measuring 3 feet 11 

 inches wide, this being also the height of the sill line above the first 

 floor level. Beginning at the level of the top of the second story 

 windows there are four courses of granite, the first serving as lintels, 

 the second and third forming the main cornice, and the fourth the 

 sill course for the third story. Above the third story windows are 

 three courses, forming the lintels, a secondary cornice and a low 

 parapet. All other surfaces are of the light colored brick. The en- 

 tire height of the walls above grade is 79 feet 10^ inches. In the 

 ground story the thickness of the wall masonry is 2 feet 10 inches; 

 and in the first, second and third stories, 2 feet 6 inches, the walls 

 being recessed to the extent of 4 inches from the water table up. 



The width of the typical window openings is the same in all stories, 

 namely 11 feet | inch, the exceptions being presented by a few win- 

 dows at the junction of walls, with a width of 9 feet 5 inches, and 

 certain still narrower openings into stair towers and wells. The 

 typical piers between openings are 7 feet 5f inches wide. The open- 

 ings of the windows in the ground story are 11 feet 2 inches high, with 

 a low segmental arched head and a minor reveal around the sides and 

 tops of each opening. The granite sill line is 2 feet 3 inches above 

 the floor level in parts of the story and 2 feet 6 inches elsewhere. 

 Four doorways leading into each court from the wings and ranges 

 have the same width and treatment as the windows, the only differ- 

 ence being the extension of the openings to the floor level. There 



