“Place a well-cleaned copper plate in an earthenware vessel.
Cover it first by copper sulfate and then moist sawdust.
After that put a mercury-amalgamated-zinc sheet on top of
an energy known by the twin name of Mitra-Varuna. Water will
be split by this current into Pranavayu and Udanavayu. A
chain of one hundred jars is said to give a very active
and effective force.”
?? Agastya Samhita
(Indian Princes’ Library)
By the way, MITRA-VARUNA is now called cathode-anode, and Pranavayu
and Udanavayu are to us oxygen and hydrogen. This document again
demonstrates the presence of electricity in the East, long, long
ago. Source: . http://www.sacred-texts.com/ufo/ourpast.htm