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Vintage CENCO Central Scientific Metal Bar Expansion Demonstration Apparatus
Vintage CENCO Central Scientific Metal Bar Expansion Demonstration Apparatus
Vintage CENCO Central Scientific Metal Bar Expansion Demonstration Apparatus
Vintage CENCO Central Scientific Metal Bar Expansion Demonstration Apparatus

Vintage CENCO Central Scientific Metal Bar Expansion Demonstration Apparatus

$ 6.33

Availability: 100 in stock
  • All returns accepted: ReturnsNotAccepted
  • Condition: Used

    Description

    Vintage CENCO Central Scientific Metal Bar Expansion Demonstration Apparatus. Consists of two metallic bars welded together, that when heated, demonstrate how different metals expand at differing rates. I believe the two metals are brass or copper and steel. Handle is plastic. Picture 2 shows metal bar being straight at normal room temperature and picture 3 the same metal bar when heated by a hot air dryer. After returning to room temperature the metal bar is again straight. Teaching aid. Overall length is approx. 12-1/2".