Re: coherers

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "Gary Peterson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <glpeterson-at-tfcbooks-dot-com>
> 
> > Materials influence is complex and hard
> > to control.  As simple a matter as changing
> > to a new file can affect the sensitivity.
> 
> The Tesla-Scherff correspondence refer to the following materials for use in
> the C/S coherers: aluminum wire chips; aluminum wire nickel-plated cut into
> small particles; 10/1000" nickel wire cut into small particles 10/1000"
> long; five grades of silver filings, marked No. 1 to No. 5, the former
> number being the finest and the latter the coarsest; and bismuth filings.

	Where did you read that correspondence?  Any mention of how they
chopped up that wire?  How about relative performance of the various
materials?  As for bismuth, I have some very fine powder I've been
intending to try.

Ed