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Read the full text (public domain)", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_52778", "title": "The Gases of the Atmosphere: The History of Their Discovery — William Ramsay", "shelf": "gutenberg", "surface": "secular", "snippet": "The Gases of the Atmosphere: The History of Their Discovery, by William Ramsay. Subjects: Chemistry -- History; Argon; Air. Read the full text (public domain): https://www.gutenberg.org/ebooks/52778", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_book_75284", "title": "An inquiry into the propagation of contagious poisons, by the atmosphere — Somerville Scott Alison", "shelf": "gutenberg", "surface": "secular", "snippet": "An inquiry into the propagation of contagious poisons, by the atmosphere, by Somerville Scott Alison. Subjects: Public health; Communicable diseases. 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The ", "authority_tier": "reference", "source": "NASA technical documents (PD, 17 USC 105)", "generated": false}, {"id": "card_src_fed_nasa_techdoc_19630002810", "title": "Z-FUNCTION SOLUTIONS FOR THE MOTION AND HEATING DURING ATMOSPHERE ENTRY FROM EQUATORIAL ORBITS OF A ROTATING PLANET", "shelf": "science", "surface": "secular", "snippet": "Z-FUNCTION SOLUTIONS FOR THE MOTION AND HEATING DURING ATMOSPHERE ENTRY FROM EQUATORIAL ORBITS OF A ROTATING PLANET. A United States federal publication, public domain (17 USC 105). The full text (997", "authority_tier": "reference", "source": "NASA technical documents (PD, 17 USC 105)", "generated": false}, {"id": "card_works_ideal_gas", "title": "The ideal gas law solves for temperature", "shelf": "the-works", "surface": "secular", "snippet": "PV = nRT. Given a pressure, a volume and an amount, the temperature is fixed — one mole in 22.4 litres at one atmosphere sits near the freezing point of water.  Worked & sealed by the engine — T = PV/", "authority_tier": "verified", "source": "The Works — worked & sealed", "generated": false}, {"id": "card_n_9ab6ee5e792c", "title": "The radio horizon — why towers are tall", "shelf": "science", "surface": "secular", "snippet": "Pure geometry, sealed: from height h the horizon lies at √(2hR) — a 100 m tower\nreaches 35,695 m ≈ 35.7 km: https://narrowhighway.com/s/d6211f4efb2518c6de145decf57f27b131a01c24ce7841853f395b7bc986c323", "authority_tier": "engine_derived", "source": "Concordance assay — 2026-07-09", "generated": false}]}