358 Scientific Proceedings, Royal Dublin Society. 



7. Erinoid of blonde colour has a considerably larger resistance than the 

 other varieties tested : probably due to greater skin or contact resistance. 1 



8. The specific resistance of erinoid diminishes with the thickness of the 

 sample. 



9. The break-down voltage of erinoid and fibre is practically the same. 



In conclusion, acknowledgment must be made to the Erinoid Company, 

 Lightpill Mills, Stroud, Gloucestershire, for their kindness in giving the 

 material used in these tests and permission to incorporate the results obtained 

 for erinoid at the National Physical Laboratory. 



1 This was definitely shown, later, by testing machined blonde erinoid and finding it 

 liad practically the same resistance as black and red erinoid. 



