nichrome	10.0siemens/meter
lead		5.0siemens/meter
tin		9.0siemens/meter
brass		1.0siemens/meter
tungsten	1.0siemens/meter
aluminum	3.0siemens/meter
gold		4.0siemens/meter
copper		5.0siemens/meter
silver		6.0siemens/meter
