On supporting science journalism
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“Smoke helmets, smoke jackets, and self-contained breathing apparatus generally are used in mines of all kinds, fire brigades, ammonia chambers of refrigerating factories and other industrial concerns. The curious gear is intended to supply the user with air for about four hours. Oxygen can be supplied from a steel cylinder. Some shipping companies absolutely refuse to carry compressed oxygen in steel cylinders, however. Now a new substance, known as ‘oxylithe,’ has come along. The stuff is prepared in small cakes ready for immediate use, and on coming in contact with water it gives off chemically pure oxygen.”
—Scientific American, February 1907
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