The message
from Malcolm Ogilvie contains these words:

I'm interested in a method of extraction from a cubic mile of seawater
as I have this (or at least the edge of same) just outside my front
door. Any references?

The cost of the chemicals required for removing all the other salts is
more than the value of the gold recovered.

--
Rusty
Open the creaking gate to make a horrid.squeak, then lower the foobar.
http://www.users.zetnet.co.uk/hi-fi/