Talk:Siemens mercury unit

Possible references

 * The morals of measurement
 * Historical Studies in International Corporate Business.
 * Electric Telegraph R Sabine 1867. interesting detail on conicalness of glass tubes

How were they used
Something I read about careful preparation of the terminal wires suggested that wires are dipped anew into the mercury each time a measurement is taken. - Or were tubes sealed with solid terminals ever/often used ? - Rod57 (talk) 13:58, 27 August 2015 (UTC)