262 



TABLE 270. 



SPECIFIC RESISTANCE OF METALLIC WIRES, 



This table is modified from the table compiled by Jenkin (1862) from Mattoiessen's results by taking the resistance of 

 silver, gold, and copper from the observed metre gramme value and assuming the densities found by Matthiessen, 

 namely, 10.468, 19.265, and 8.95. 



SMITHSONIAN TABLES. 



