The answer is simple. Neither your tap water nor your distilled water is pure. Mains filtration plants are very good at removing particles, hence you will often see no laser line. On the other hand it probably still contains plenty of dissolved salts (invisible to a laser) so if you used a meter in the mains water you would get a significant reading.

If your distilled water is displaying a laser line it contains fine particles, so its either not distilled in the first place or its being contaminated after distilling. Unless your glass jar is obviously unclean its not likely to add significant particles to the water.

David




*From:* Dee <d...@deetroy.org>
*To:* silver-list@eskimo.com
*Sent:* Saturday, October 18, 2014 7:02 AM
*Subject:* CS>Conundrum

I shone a laser through my distilled water and I got a distinct Tyndall effect, just the same as I get through my finished CS. Can anyone explain this? If I shine it through tap water there is nothing...dee

Sent from my iPad



On 19/10/2014 5:36 AM, silver-digest-requ...@eskimo.com wrote: