T ABLE 1 . 



FUNDAMENTAL AND DERIVED UNITS, 



To change a quantity from one system of units to another : substitute in the correspond- 

 ing conversion factor from the following table the ratio of the magnitudes of the old units 

 to the new and multiply the old quantity by the resulting number. For example : to reduce 

 velocity in miles per hour to feet per second, the conversion factor is // 1 ; /=528o/i, 

 /=36oo/i, therefore the factor=528o/36oo=i.467. 



(a) FUNDAMENTAL UNITS. 



Name of Unit. 



Symbol. 



Conversion Factor. 



Length. 



Mass. 



Time. 



Temperature. 



Electric Inductive Capacity. 



Magnetic Inductive Capacity. 



L 



M 

 T 

 

 K 

 P 



() DERIVED UNITS. 

 I. Geometric and Dynamic Units. 



Name of Unit. 



Conversion Factor. 



Area. 

 Volume. 

 Angle. 

 Solid Angle. 

 Curvature. 

 Tortuosity. 



Specific curvature of a surface. 

 Angular velocity. 

 Angular acceleration. 

 Linear velocity. 

 Linear acceleration. 

 Density. 



Moment of inertia. 



Intensity of attraction, or " force at a point." 

 Absolute force of a centre of attraction, or " strength ") 

 of a centre." ) 



Momentum. 



Moment of momentum, or angular momentum. 

 Force. 



Moment of a couple, or torque. 

 Intensity of stress. 

 Modulus of elasticity. 

 Work and energy. 

 Resilience. 

 Power or activity. 



//~ 2 



w/ 2 

 //~ 2 



mtr 1 

 mtr* 



m /- 1 /-' 



SMITHSONIAN TABLES. 



