All issues were published in 1920. Issues are dated January 3, 10, 17, 24, 31, February 7, and April 24. Summary of content highlights An explanation of Einstein’s Theory of Relativity. Mountain Peak Grazing.
This large issue (12X16″) is in good condition. Lots of drawings and artwork. Index of patents and inventions for two weeks hence listed;. February 13, 1886. Inquire about other issues. The Industrial Revolution is in full swing.