Men of Invention and IndustryNote 4 — ASTRONOMERS AND STUDENTS IN HUMBLE LIFE: A NEW CHAPTER IN THE 'PURSUIT OF KNOWLEDGE UNDER DIFFICULTIES.'Reading editionThe Observatory, Nos. 34, 42, 45, 49, and 58.◇Copy noteReturn to ASTRONOMERS AND STUDENTS IN HUMBLE LIFE: A NEW CHAPTER IN THE 'PURSUIT OF KNOWLEDGE UNDER DIFFICULTIES.'