[meteorite-list] Brownlees in Rainwater

[Jerry]

There you go Francis, worth every kilonewton of effort. But, first I have to 
set up a few collectors away from local pollutants, which in my case may be 
more feasible than some. I live in the "boondocks" as it were, 1 1/2 mile 
off tar roads and right smack in the middle of nothing. [Also great for star 
watching!] Nothing much I can do about the stuff deposited via jet streams 
so pictures may help to recognize comparative photos of microites in all the 
journals and have some semi scientific fun.
Setting up collecting apparatus in several locations won't be an issue, so, 
better stop gabbing, grab my plastic trash can covers, white poly, add a 
little H2O to keep whatever lands from bouncing out, use my refrigerator 
magnets first, then the neo ones, set up my stereoscopes etc.,
Who knows where such may lead and really who cares?! An instinct, an idea 
followed is motivation and satisfaction all rolled into one.
It beats bantering but truly everyone's opinion has been very very helpful 
in getting me charged up.
Jerry Flaherty
----- Original Message ----- 
From: "Francis Graham" <francisgraham at rocketmail.com>
To: <meteorite-list at meteoritecentral.com>
Sent: Thursday, November 22, 2007 8:53 AM
Subject: Re: [meteorite-list] Brownlees in Rainwater


> Hello
>  Jerry was thinking along the same lines I was.
> I was wondering how one might begin such a study on a
> small budget.
>  One method that might be used is to gather the iron
> spherules that morphologically resemble Brownlees and
> put them into a millimeter high and wide pile. Place
> them in between two jaws of a 100% copper electric
> spark gap. Then, using a Bunsen Kirchoff spectroscope
> with a camera in the back --available in most teaching
> labs--snap a picture of the spectrum. Repeat with a
> similar piece of Gibeon or Campo, and then maybe some
> industrial debris. I'll bet the nickel content in the
> spectrum will give it away as mostly meteoritic, or
> confirm it is not. Nickel has 6 close lines of
> emission in the blue-violet region that are
> characteristic of it, the second to shortest wavelenth
> is actually triple.
>  Of course, you'll have no more micrometeorite sample
> doing this test--it will vaporize. But at least then
> you could be fairly sure what the next micrometeorite
> candidates you collect are.
>  So now that I have done my thinking on line, it must
> be actually attempted!
>
> Francis Graham
>
>
>
>
>
> 
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