In 1938 he was appointed lecturer in metallurgical chemistry.
2.
He attended the public schools of Niles, Mount Union College, and Rensselaer Polytechnic Institute, where he majored in metallurgical chemistry.
3.
In 1906 Rosenhain became the first superintendent of the department of metallurgy and metallurgical chemistry at the National Physical Laboratory, he held this position until 1931.
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