24 ORGANIZATION AND BUILDINGS. 



and a top 8 inches thick, built upon a foundation which extends 

 3 feet below the level of the ground, provided with a broad footing 

 and carried up entirely clear of the building. At a distance of 10 

 feet from the main pier and on each side is a secondary one 

 brought up from the ground in the same manner, the group of 

 three forming a triangle. All of the stability necessary for electric 

 and other work is obtained by this arrangement. On one side of the 

 main physics room is an ordinary wall desk supplied with gas and 

 water for the purpose of electric conductivity measurements and 

 physical chemistry. It is provided with storage-battery connection 

 and is to have a large permanent thermostat tank attached to one 

 end. 1 Back of this main room to the east and connected with it by 

 a doorway is a second one. It contains the ordinary wall desk and 

 hood and is intended for the usual chemical work so necessary in a 

 physical laboratory. Finally, to the east of the two just mentioned 

 is a third for photometric work. It contains a long and heavy photo- 

 metric table placed upon piers built in the same manner as the 

 ones which have been described. The facilities in the division of 

 weights, measures, and physics will be such that all classes of 

 work needed in the adjustment of the weights and measures of the 

 Islands can be carried on. 



Across the hall from the rooms intended for physics and weights 

 and measures is a large room to be used as a place for studying 

 commercial processes. It has the usual central worktable and a 

 long hood. One of the walls, differing from the general usage in 

 the building, is occupied by a table on which are placed the shaking 

 and stirring machines necessary for much of the work to be done 

 in connection with the extraction of organic products. These 

 machines are operated by a motor of one-half horsepower and are 

 belt driven. The window desk is intended for distillations in which 

 ether and other volatile inflammable substances are used, and as a 

 consequence gas has been omitted from it, the heating being by 

 means of steam only. At the east end is an alcove in which are 

 placed various machines to be used in studying commercial proc- 

 esses. They consist of a copper still of 90 liters' capacity which 

 is supplied with a steam jacket so arranged that either indirect 

 or direct steam may be used. The apparatus is supplied with 



*P1. XVII is a photograph of the main room devoted to physics and 

 physical chemistry. 



