A. L. Day and J. K. Clement — Gas Thermometer. 413 



which existed in the room, and the latter, if serious, as it some- 

 times was in the summer months, yielded to the increased air 

 circulation produced by an electric fan. 



When the furnace was mounted in position, the cover, from 

 which hung the thermoelements and the bulb, was permanently 



Fig. 1. 



«— Thermoelements 



Manometer 



Fig. 1. A section through the gas thermometer furnace (about one-sixth 

 natural size). The bulb is shown in position with the furnace closed ready 

 for heating. The capillary tube connecting with the manometer passes out 

 of the furnace through a packed joint at the upper right-hand corner. The 

 thermoelements pass through the center of- the cover as indicated. The 

 water-jacketing is sufficiently complete so that tight joints are readily 

 obtained with ordinary rubber packing. 



fixed upon three upright steel rods. The body of the furnace 

 bomb was then arranged to be lowered away from the cover by 

 sliding upon two of the rods so as to expose the bulb and ele- 



