The SciencesJune 1, 1922
Ashes and Sawdust the Basis of a New Industry
Stories by C. M. Lewis
The SciencesJuly 16, 1921
Man-Made Precious Stones
Efforts of the Past and Present To Produce Synthetic Rubies, Sapphires, and Even Diamonds
Ashes and Sawdust the Basis of a New Industry
Man-Made Precious Stones
Efforts of the Past and Present To Produce Synthetic Rubies, Sapphires, and Even Diamonds