>Oh, great. I remember vaguely that one of the reasons for which brass is
>not ok for in vivo is the fact that it has to be used necessarily with
>steel tools (like blades). The resulting battery (when steel touches brass
>directly or through a solution with a different conductivity) and its
>electro-chemical products, and the corrosion that should ensue, are
>undesirable, to put it mildly. Maybe your rabbits will behave like that
>battery manufacturer's ones in the tv ads, i.e. run forever. I would test
>the assemblies in physiological solution for a week or so before using
>them.
>
>glad not to be a rabbit,
>
>Peter the not rabbit

They actually get embedded in a layer of dental acrylic, and never actually
contact the skull or any tissue.  We have already implanted a few early
generations of these, and they are not so different that a design that
has been in use for years.

The joining problem hasn't ever been solved, though.  I'm going to try
the heating/cooling trick, and possibly some JB Weld, and see if either
of those work.

Mike H.

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