Liquid balance: a teacher teaching solid density and liquid density has students in a classroom. Anonymous illustration from 1925. Private collection.Anonymous Anonymous |
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Undated · Engraving
· Picture ID: 916018
colour · colours · engraving · physical · child · knowledge · human · childhood · teacher · lecon · blackboard · school boy · youth · school class · 20 20th 20th xx xxth 20th century · school · education · bianchetticor · schema · energy · energy · Private Collection / Bridgeman Images |
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