468 



Dr. Meyer Wilderman on the Velocity of 



so that we cannot claim for cobalt the same accuracy as in 

 iron, steel, and nickel. But we notice a distinct increase of 

 •elasticity, as shown in fig.8 and the following table : — 



h/t. 



1005 gr. 



2830 gr. 



100 



0-24X10- 2 



O-OSxIO- 2 



200 



0-48 



022 



300 



0-y9 



0-33 



400 



0-70 



0-39 



The total depression d due to a suspended weight T is 

 calculated by the formula, neglecting the weight of the bar 

 itself, 



, J W 

 12ttER 4 ' 



where R is the radius of the bar. 



Generally speaking, the above results for iron, steel, and 

 nickel are far greater than those given by former experi- 

 menters. That the modulus of elasticity of nickel decreases 

 in weak fields has not yet been observed. Moreover, no 

 experiment has ever been tried with cobalt. 



We have to express our cordial thanks to Profs. H. Nagaoka 

 and A. Tanakadate for valuable suggestions in carrying out 

 the present experiments. 



LII. On the Velocity of Reaction before Complete Equilibrium 

 , and the Point of Transition are reached, §c. — Part III. 

 By Meyer Wilderman, Ph.D., B.Sc. (O<von.) *. 





<(p 



Contents. 



I. The general laws concerning- all kinds of equilibrium in hetero- 

 geneous systems, and velocity of reaction before any one of them. 

 II. The true meaning of the equations for chemical equilibrium in 

 heterogeneous systems. The laws of chemical Telocity of reaction 

 in heterogeneous systems. 

 III. On the real and apparent points of chemical equilibrium in hetero- 

 geneous systems. 



I. General Laws. 



WE now pass to the determination of the general laws 

 which concern all three kinds of equilibrium in 

 heterogeneous systems and the velocity of reaction before 

 any one of the three kinds is reached. 



* Communicated by the Author. 



