New Reading of Relativity. 3D 



is not exhausted when redefining simultaneousness [Einstein] 

 is added to the other avowed purpose of gaining in formal 

 symmetry [Lorentz]. The same thought is continued, if we 

 recall too how gravitation-force (G 2 ) is "apparent" in 

 weight (W T ), with reduction factor that in the simplest case 

 takes either form, 



W.-GiJl-g); G 1 = W 1 (l+^). . (10) 



This essential parallelism of equations (13, 16) throws new 

 light on reading (u) in terms of imaginary rotation *. 



A second standard use of equations of motion adopts force as 

 physically determinate (given) and predicts its kinematical 

 effects by calculation. This would impose (T ) invariantlv 

 upon (U,F): one stock instance is a convected compressed 

 spring. Then we should pair with equation (12) 



m dv' i dm 



where now the accelerations (dv'/dt, dv /dt) fall away from 

 equality, when the given values accompanying the same (m) 

 are 



T ^ T a ' ; v' = v — u. 



Evidentl}" also, the last relation would not be a permanent 

 adjustment. What devices may look towards reconciling 

 the divergent plans of equations (13, 17) is the next natural 

 (juestion. 



The answer will begin at considering the activity (v'T ) 

 developed by the force (T ) of equation (17) at the working- 

 speed (r'). In this aspect, both factors belong immediately 

 to (U). In view of equation (13) that activity is equivalently 



»'T„=»'-^ r = /— ~\T a '=vJT a >,. . (18) 





(r c ') being a calculated (auxiliary) speed, but without de- 

 parture from C.G.S. measure. Thus the activity within (U) 

 of a force (T ) implying unequal accelerations in ([J, F) can 

 be equalized with that of a force (IV) implying equal 

 accelerations, if at the same time the working-speed bo 



* Minkowski; Sommerfeld. It is arithmetic to adjust a "length- 

 contraction " to producing numerical equality of the fields (G, g). The 

 difference that these replace (c 2 ) is provably superficial. 



