NATURAL HISTORY BUILDING 75 



jority of the metal entrance doors are of metal without trims on either 

 side. On the south side of the west wing, however, there are metal 

 trims on both sides of all openings having metal doors and wood 

 trims where wood doors occur. These door openings, moreover, are 

 provided with wood bucks, as are also those in the terra cotta parti- 

 tions of the suite of rooms at the north end of the north wing, the 

 toilet and housekeeping rooms, and the attic stairs. 



All entrance doors open into the rooms and all doors have wood 

 thresholds except those of the toilet rooms in the third story and the 

 rooms opening into the middle hall in the ground story, which are 

 provided with marble thresholds, and two of the small rooms com- 

 municating with the north entrance lobby, where the material is 

 cement. 



All doors of the typical pattern are hung with three 4| by 4^-inch 

 hinges, except the wood communicating doors fitting against metal 

 bucks in the third story, which have two 4-inch hinges. The locks 

 are morticed and of the paracentric pattern. A large number of 

 the entrance doors are also provided with checks of the Blount type 

 and with stops. Essentially all exposed parts of the hardware are 

 of cast bronze, antique color, or electroplated in imitation thereof. 



MISCELLANEOUS 



STAIRS 



The building contains three stairs for public use, two of which 

 occupy the tower-like constructions at the northern corners of the 

 south pavilion, the third being located on the eastern side of the north 

 pavilion. Beginning in the ground story, the former extend to the 

 attic or fourth story, while the latter stops at the third story. They 

 are of similar detail treatment, consisting of marble and ornamental 

 iron work fastened on structural steel framing, but differ in the ar- 

 rangement of the runs and platforms. The wells of the tower stairs 

 are elongate in plan and 13 feet lOJ inches wide by 35 feet 8| inches, 

 deep, but that of the northern stairs is practically square, measuring 

 22 feet 3^ inches across and 22 feet 5f inches deep. Ten-inch stringer 

 I beams, carried in three lines, one under the center and one on each 

 side of the runs of stairs, furnish attachment for the metal work nec- 

 essary to support and fasten the steps, facia and handrails, and also 

 enter into the framing of the platforms between floors. The width 

 of the tower stairs from the wall to the center of the handrail is 5 

 feet 11^ inches, and of the northern stairs, 6 feet. 



Beginning with a cast-iron newel in the ground story, the rail is 

 continuous on all runs and platforms to the top of the stairs. The 

 rail proper is of cast iron but the other straight members are of 

 wrought iron. The latter carry a continuious volute and rosette mo- 



