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ABSTRACT THE process of building up tubes, which Mr. Mallet has been so kind as to suggest to me through your valuable journal, has been tried, but was unsuccessful through the same defect
as caused the failure of many of my other experiments, namely, leakage without bursting. Some of the tubes found empty would bear, when cold, a pressure of ten tons on the square inch
without leaking, showing that the gases escaped through the porosity of the iron at a high temperature. Hydrogen and hydrocarbons seem to go through iron at a red heat very easily, and the
direction in which. I am working is to obtain an impervious coating, or a method of “clogging” the iron, as seems to have sometimes taken place in the carbon experiments. Access through your
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AUTHORS AND AFFILIATIONS * Private Laboratory, Glasgow J. B. HANNAY Authors * J. B. HANNAY View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND
PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE HANNAY, J. Artificial Diamonds. _Nature_ 22, 241 (1880). https://doi.org/10.1038/022241b0 Download citation * Issue
Date: 15 July 1880 * DOI: https://doi.org/10.1038/022241b0 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get shareable link Sorry, a
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