754 Dr. Bottomley and Mr. King : Experiments with 



contorted into a sort of crumpled form. They can both be 

 driven in the same direction relatively to the centre; and they 

 remtiin in this contorted condition, only slowly resuming 

 their natural state. 



It is difficult to make a drawing to illustrate the crooked 

 forms into which the leaves are sometimes twisted, but an 

 attempt to do this is made in figs. 4 and 5. This twisting 



Firr. 4. 



Fijr. 5. 



»>- 



J&- 



makes it evident that the leaves are subjected to considerable 

 local forces, with rapid variations as to direction and amount, 

 from point to point within the enclosure- Putting the hand 

 to the aluminium wire m, n, or catching hold of it between 

 the fingers, makes no difference to the gold leaves ; nor does 

 the putting of a spirit-flame (Gilbert and Faraday's method 

 of discharging electrification) in contact with the outside coil 

 at the end of the aluminium wire m, n have any effect. The 

 deflexion remains unaltered and the leaves are not relieved 

 of their charge, as would be the case with an ordinary charged 

 electroscope. 



Experiment 9. — To find whether the gold leaves were 

 affected from a distance, by a source of light, a Nernst lamp 

 was set up about 6 metres distant from the electroscope, and 

 the image of the filament was projected upon the glass 

 enclosure. As soon as the light from the Nernst lamp fell 



