160 Oi;()L()(iY OF THE COMSTOCK LODE. 



each ooiitact, tlie volocity of tlie slieets will not l)e equal According to 

 Morin's law, however, the truth of which will be assumed, the frictional 

 resistance is independent of the velocity. The sheets will start and stop 



I'u;. ;5. — System of ecinal, vertical, inovablu sheets. 



at the same instant, and there is no error, except that inherent in Morin's 

 law in supposing- each slieet to move throughout its path at a uniform 

 velocitv. 



Ratio of the movements of sheets. Let tllB total mOVCmeUt of P„ bc i„ aud itS 



entire movement up to a given instant be //„. Then, since the velocities 

 may l)e regarded as constant, 



.'/ _ '^ _ r 



and 



— , — ^n^ 

 .'/„-^l ''„ 1 



or the ratio of the movements of anv two adjoining sheets is constant. Since 

 each sheet controls the movements of all its successors, of which there are 

 supposed to be an iutinite number, each sheet bears the same relation to 

 those which follow it. If the first n sheets were rejected and F,^ were forced 



