100 Hon. R. J. Strutt on the Discharge of 



the gas-burner when screens were interposed. As, however, 

 the electroscope was exhausted, to improve the insulation, the 



&3l3H/0A/t/tV 



gold-leaf was liable to show radiometer effects. These could 

 be greatly mitigated by not pushing the exhaustion of the 

 electroscope too far. 



