FUNDAMENTAL AND DERIVED UNITS. 



TABLE 1 



//. Heat Units. 



Name of Unit. 



Conversion Factor. 



Quantity of heat (thermal units). 



" " (thermometric units). 



" " (dynamical units). 



Coefficient of thermal expansion. 

 Conductivity (thermal units). 



" (thermometric units), or diffusivity, 



" (dynamical units). 



Emissivity and imissivity (thermal units). 



" " (thermometric units). 



" " (dynamical units). 



Thermal capacity. 

 Latent heat (thermal units). 



" " (dynamical units). 

 Joule's equivalent. 



Entropy (heat measured in thermal units). 

 " ( " " dynamical units). 



m l~ l r 1 



m /r 3 b~ l 

 m /~ 2 t~ l 



6~ l 



m 

 m 



e 



I 2 

 m 



r r 2 e- 1 



///. Magnetic and Electric Units. 



Name of Unit. 



Conversion factor 

 for electrostatic 

 system. 



Conversion factor 

 for electromag- 

 netic system. 



Magnetic pole, or quantity of mag- ) 



netism. > 



Density of surface distribution of (^ 



magnetism. j 



Intensity of magnetic field. 

 Magnetic potential. 

 Magnetic moment. 

 Intensity of magnetisation. 

 Magnetic permeability. 

 Magnetic susceptibility and mag-) 



netic inductive capacity. | 



Quantity of electricity. 

 Electric surface density and electric ) 



displacement. ) 



Intensity of electric field. 

 Electric potential and e. m. f. 

 Capacity of a condenser. 

 Inductive capacity. 

 Specific inductive capacity. 

 Electric current. 



I* r 2 # 



?*/* 



w* /- r 1 

 m * / r 1 K 

 ik 

 k 



SMITHSONIAN TABLES. 



