;;.".' ; ' Report BiitAssoc.1865 



PlcUe 10. 



Standard Unit of Electrical Resistance . 



Metal. 

 Ebonite . 



SECTION. 



ELEVATION . 



'-full 



r^r Parafihe . 



5 older. 



SIDE ELE\'AT10N. 



Erurraved by JWlonrrv- 



