Eric,

How about doing some testing of the air quality (acidity) at the 
specific location & elevation and projections of future pollution over 
200 years? As I understand it re: Live Earth there may not be many 
people around to worry about it. Then again, only high elevations of 
Minhattan may be evident in 200 years.

I agree w/ Leland about the not any old tin knockers. Can the 
not-any-old-tin-knockers be found? Not exactly as if one can google that 
and get like w/ Home Depot a result w/in 50 miles, 30 miles, around the 
corner. Will they be willing to work in the environment? Will the 
'system' lean towards not-any-old-tin-knockers or is there a higher 
potential outcome that the system will provide not-quite-tin-knockers? I 
agree wholeheartedly on going for the gold standard. I am increasingly 
cynical in my old age that a trust in the 'system' leans towards a 
potential of screw up at 99%.

My perspective would be to not worry about the performance of the 
materials as much as that the contract-bid situation would lead to 
supply of mechanics (not exactly their fault) not up to the task and 
that a goal of good workmanship and longevity has to take into 
consideration just how the final installation might actually happen. If 
not the use of a more commonly understood and more easily workable 
material by less skilled mechanics might not actually last longer than a 
theoretically more durable material installed by functional morons.

I say this with it in mind that I spent a Saturday morning a few 
weekends ago down in Little Italy (China Town) up on an 86 lift w/ an 
Albanian operator who amidst banging the basket into the wall, getting 
the machine hung up, the machine shutting down etc. and his not being 
too in-tune with what the little pictures meant on the control panel 
(the machine is owned by the company and arrived on their truck) the 
whole time saying, "God bless America! How come there are so many 
Chinese here? Is this China? God bless America! I am the expert!"

][<en

Leland Torrence wrote:

> Eric,
>
> Attached below is a good simple chart for galvanic reactions.
>

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