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Sketch test tube stand.
Support stand 1 support clamp 1 swivel clamp 2 swivel clamp holder 1 table clamp 2 tapered clamp 1 test tube clamp 2 thermometer clamp 1 thermometer extension clamp 1 three prong clamp 1 tong covering sleeve 1 tri clover 1 tubing clamp 6 tubing clamp maxi 1 two prong clamp 1 two prong dual adjust clamp 1 ultra.
T he national museum of american history suggests that michael faraday and jons jacob berzelius may be the co inventors of the test tube.
The glass tubes first emerged in the early part of the 19th century.
Earlier than that research suggests that experiments were carried out using wine glasses.