520 



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



TABLE VII. Emissivity in Dry Hydrogen at Atmospheric Pressure. (See fig. 3.) 



TABLE VITT. Emissivity in Dry Hydrogen at 6 centims. Pressure. (See fig. 3.) 



TABLE IX. Emissivity in Dry Carbon Dioxide at Three Atmospheres Pressure. 



(See fig. 4.) 



