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| Keywords: Tyndall's glass tube.gif en The apparatus with which John Tyndall observed the Tyndall effect <br> L represents the electric lamp s s' the experimental tube pp' the pipe leading to the air-pump and F the test-tube containing the volatile liquid The tube t t' is plugged with cotton-wool intended to intercept the floating matter of the air; the bent tube T' contains caustic potash the tube T sulphuric acid the one intended to remove the carbonic acid and the other the aqueous vapour of the air http //www gutenberg org/files/24527/24527-h/24527-h htm Toc158391601 John Tyndall's draughtsman; scanned by Jon Richfield 1879 or earlier PD-Old Tyndall effect | ||||
