To make things worse -

the habit of dropping money into wishing wells....

for example, the English penny, metal content, 95% Copper, 4% Tin, 1% Zinc,
it doesn't take many of these to get a kg of copper...

so next time you want to be mean with your wishes, drop something with a
lower copper content, and a higher denomination.

For those of you wanting to know where there is an eco friendly higher
denomination only, (including banknotes) wishing well, contact me for my
address :-)

Jim





----------------------
 www.jimfranklin.info

PIC Micro Application website
-----------------------------

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jinx
Sent: 02 March 2004 02:00
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE:] My first PCB production


> What is "contamination" though, 1ppm? 20ppm?

According to some toxicology reports on the web, 5ug/l of copper
chloride is the lower limit for aquatic life. Not much is it ?

IOW 180,000,000 litres per kg or 21,000,000 US gallons / lb

A cube with 56.4m (181ft) sides

That's why I don't tip it down the sink

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