Abstract
DURING the summer of 1924, while experimenting at Indiana University with a Kundt's tube, I discovered that the striæ could be most readily observed by using pith dust in the tube. I obtained the pith dust by grinding dry pith from sunflower on a fine-grained emery wheel. By the use of this dust I was able to obtain discs that extended completely across the tube and having the same diameter as the inside of the tube.
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COOK, R. Use of Pith Dust in Kundt's Tubes. Nature 118, 157 (1926). https://doi.org/10.1038/118157b0
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DOI: https://doi.org/10.1038/118157b0
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