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 Originally Posted by semi-ambivalent
530 pages!? Now that's a catalog. I remember in high school looking through the Cencor catalog like it was the Sears catalog. 
s-a
Post Apple Scientific is just across town from where I live. Only takes 20-30 minutes to get there from my house.
The owner is a pretty good guy. He can get whatever you need, within the limits of the law. If he knows you well enough, those limits can be stretched a little. 
He's the only place where I can get real tincture of iodine. There's some rule that says you're only allowed to buy 2 grams of elemental iodine crystals at a time. (Or some amount. I forget exactly.) But, if you go there to talk to the guy in person, explain what you want and why you want it he can be convinced to sell you a little more.
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I've gone digital. Edmund scientific makes a good one. Fischer and other scientific suppliers sell them as wll. They are fast and accurate. You want one that's got a probe or is specifically water tight. The first one I bought, I think it in a photo store, was a wand type with the read-out at the top. Within days I dropped it into a beaker and drowned out the circuitry.
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