CALORIMETER LABORATORY. 3 



CALORIMETER LABORATORY. 



The laboratory room is entered from the main hall by a double door. 

 The room is 14.2 meters long by 10.1 meters wide, and is lighted on three 

 sides by 7 windows. Since the room faces the north, the temperature con- 

 ditions are much more satisfactory than could be obtained with any other 

 exposure. In constructing the building the use of columns in this room 

 was avoided, as they would interfere seriously with the construction of the 

 calorimeters and accessory apparatus. Pending the completion of the five 

 calorimeters designed for this room a temporary wooden floor was laid, 

 thus furnishing the greatest freedom in placing piping and electric wiring 

 beneath the floor. As fast as the calorimeters are completed, permanent 

 flooring with suitably covered trenches for pipes is to be laid. The room 

 is amply lighted during the day, the windows being very high, with glass 

 transoms above. At night a large mercury-vapor lamp in the center of the 

 room, supplemented by a number of well-placed incandescent electric lights, 

 gives ample illumination. 



GENERAL PLAN OF CALORIMETER LABORATORY. 



The general plan of the laboratory and the distribution of the calorime- 

 ters and accessory apparatus are shown in fig. 1. The double doors lead 

 from the main hall into the room. In general, it is planned to conduct all 

 the chemical and physical observations as near the center of the laboratory 

 as possible, hence space has been reserved for apparatus through the center 

 of the room from south to north. The calorimeters are on either side. In 

 this way there is the greatest economy of space and the most advantageous 

 arrangement of apparatus. 



At present two calorimeters are completed, one under construction, and 

 two others are planned. The proposed calorimeters are to be placed in the 

 spaces inclosed by dotted lines. Of the calorimeters that are completed, 

 the so-called chair calorimeter, which was the first built, is in the middle of 

 the west side of the room, and immediately to the north of it is the bed calo- 

 rimeter, already tested and in actual use. On the east side of the room it is 

 intended to place large calorimeters, one for continuous experiments extend- 

 ing over several days and the other large enough to take in several indi- 

 viduals at once and to have installed apparatus and working machinery re- 

 quiring larger space than that furnished by any of the other calorimeters. 

 Near the chair calorimeter a special calorimeter with treadmill is shortly to 

 be built. 



The heat insulation of the room is shown by the double windows and the 

 heavy construction of the doors other than the double doors. On entering 

 the room, the two calorimeters are on the left, and, as arranged at present, 

 both calorimeters are controlled from the one platform, on which is placed 

 the observer's table, with electrical connections and the Wheatstone bridges 



