William Webb apotecary
Stanton thermal analitical balance from the Westinghouse "Astronuclear" laboratory. Can dry a substance to eliminate the error caused by moisture absorbtion.
Sartorius analitical
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William Webb apotecary
Large Laboratory scale from the 40's by Central Scientific
When air is displaced around the air filled ball, the ball lose some boiancy and puls up the weight on the other side.
opium scale
Coin scale
Hofman torsion scale |
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