MO RLE Y" AND MILLER. — THE PITZOERALD-LORENTZ EFFECT. 327 



of the computed value. If pine is affected at all, as has been suggested, 

 it is affected to the same amount as is saudstone. If the ether near the 

 apparatus did not move with it, the difference in velocity was less than 

 3.5 kilometers a second, unless the effect on the materials annulled the 

 effect sought. 



Some have thought that the former experiment only proved that the 

 ether in a certain basement room was carried along with it. We desire 

 to place the apparatus on a hill, covered only with a transparent cover- 

 ing, to see if any effect could be there detected. As the Rumford Com- 

 mittee have allowed us thus to utilize an unexpended balance, we hope 

 to make the experiment in this form, should it be possible to make 

 observations in trying conditions. 



