...på eBay.
http://stores.ebay.com/rupucis371-teflon-and-metals
Väldigt låga priser!
Manganese (IV) oxide MnO2 powder 78 grams
Zinc, pure metal granules 78 grams
Assort. PTFE Teflon film sheet tape 25, 50, 210 microns
Brass mesh net sieve 47 eyes per inch 8.07" x 11.5"
Tungsten (VI) oxide WO3 78 grams
Aluminum, pure metal granules 78 grams
Test tube stand for 17 millimeter test tubes
Iron (III) oxide Fe2O3 powder 78 grams
Iron powder, electrolytically reduced
Vad sägs om "Simple mechanical balance 1-20 grams" för endast US $0.99?
http://cgi.ebay.com/Simple-mechanical-balance-1-20-grams_W0QQitemZ7583457968QQcategoryZ48726QQcmdZVie wItem
"My old balance that I used for preparing photography processing solutions. Comes with a weight set, which includes 20 g, 10 g, 5 g, 2 x 2 g, 1 g, 500 mg, 2 x 200 mg, improvised 100 mg, 50 mg, 2 x 20 mg and 10 milligram weights. The balance and the weights show some signs of corrosion, which has no significant impact on functionality.
This balance is fairly sensitive, you can weigh down to 50 milligram accuracy with confidence, maybe even down to 10-20 mg.
Airmail shipping to Europe usually takes under 10 days, 8-18 days to the USA or Canada, a bit more to Australia or Asia."
Och så lite annat:
Spezielle Relativitatstheorie by E.Herlt and N.Salie
Grundlagen der Festkorperphysik by Weismantel, Hamann
2 kopeks 1915 Nicholas II very nice cond.