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1a. Two pan scales and other scales for Microscale Experiments
Photo 1: Egyptian two
pan scale and weights from Ancient Egypt (3350 years ago)
Photo 2: Egyptian scale produced to-day by this mechanic in Cairo´s
Khan El Khalili Bazaar. (Sensitivity down to < 50 mg = quarter of a Liquemin bottle closure)
Photo 3: Such scales
have been spread as children´s toys 50 years ago. Now kindergartens
in Israel re-introduce them again
Photo 4: These scales
used by pharmacists and goldsmiths before have a higher sensibility than most of the digital scales
used in schools.
Photo 5: Chinese scales
of this shape are still in use in different sizes.
Photo 6: This Japanese
"postcard scale" you can make on your own:
1 Yen coins are excellent 1.0 gram weights with a diameter of 2.0 cm.
Photo 7: This four year
old boy designed his own two pan scale to weigh Digimon who is more heavy
than Agomon.
Photo 8: Two pan scales
are like seasaw: The heavyweight is down.
Photo 9: With this robust
digital pocket scale PS-200 A (Conrad
order-Nr.120590-55, price 50 Euro) students can make solutions for titration.
back back to kindergarten................go on..........
..............................................................last modification: 20.01.2005.