522 



MR. J. E. PBTAVEL ON THE HEAT DISSIPATED BY 



TABLE XIV. Emissivity in Air at Atmospheric Pressure. Wire horizontal in 

 cylindrical iron enclosure. (See fig. 7, Curves II. and III.) 



TABLE XV. Emissivity in Air at Atmospheric Pressure. Gun-metal Enclosure. 



(See fig. 7, Curve I.) 



Radiating Wire Horizontal. Diameter of Wire '112 centim. 



TABLE XVI. Emissivity in Air at Atmospheric Pressure. Gun-metal Enclosure. 

 Radiating Wire Horizontal. Diameter of Wire '0600 centim. Kadiator No. 

 (See fig. 7, Curve V.) 



