26 ORGANIZATION AND BUILDINGS. 



other arrangements are like those of the chemical laboratory in 

 general. 1 



Next to the assay room is a balance room for the general use of 

 the ground floor and for the button balances, and leading from 

 this is the combustion room for organic ultimate analysis, contain- 

 ing two combustion tables and one side table supplied with gas and 

 water for the bomb furnaces. 



The storerooms are two in number and are provided with shelving 

 extending from the ground to the ceiling. One room is intended 

 for chemicals and the other for apparatus, the former being sup- 

 plied with a small laboratory worktable and hood and a distilling 

 apparatus connected with the main boilers and to be used for the 

 purpose of making distilled water. 



In the chemical wing on the second floor the only variations from 

 the general type are found in the room to the east and farthest 

 along the corridor, in which is placed a special desk with compart- 

 ments for the polariscopes, and in the main balance room. The 

 latter has one central pier running from the ground up and con- 

 structed in the same manner as the ones described above. Upon 

 this is placed a heavy balance table capable of accommodating eight 

 instruments. 2 



The photographer's room on the second floor immediately to the 

 left of the main staircase is fitted with two dark rooms 8 by 10 feet 

 with large leaded sinks, drip board, shelving, and tables, and on 

 one side is the stand for the photomicrographic apparatus. This is 

 built on a solid pier 10 feet long and 30 inches wide, constructed 

 on the same principle as the others in the building and placed well 

 into the ground on broad footings. The photomicrographic appara- 

 tus is of the latest Zeiss pattern, both stand and camera, and the 

 source of light is a 90 Thompson arc light. The photographer 

 is also supplied with 5 by 7 Graphic cameras with Zeiss series and 

 A lenses, an 8 by 1 camera with Zeiss lens, as well as a Goertz 

 anastigmat and enlarging camera and an apparatus for making 

 lantern slides. 3 



The library consists of a main room connected on either side 

 with the stack rooms. The librarian's desk is placed in the center 



1 P1. XIX is a photograph of the furnaces and apparatus in the assay 

 room. 



2 PI. XX is a photograph of the balance room. 



8 PI. XXI is a photograph of the photographer's studio. 



