ANYONE dropping very hot glass tubing into cold water expects it to shatter. However, one does not expect it to shatter in a simple geometric pattern such as a spiral. I was surprised to observe such ...
W. P. THISTLETHWAITE, Merchant Venturers' Technical College, Bristol, writes : “A few days after the appearance in Nature of October 1.9 (p. 582) of a letter on this subject, a student brought to me a ...
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