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- 08:08, 4 February 2024 The Alchemy of Air (Book) (hist | edit) [11,834 bytes] Parijat (talk | contribs) (Created page with " ==== On gunpowder ==== * Because every barrel of gunpowder required three-quarters of a barrel of saltpeter, access to saltpeter became a matter of national survival. * In 1626 England’s King Charles I commanded his subjects to “carefully and constantly keep and preserve in some convenient vessels or receptacles fit for the purpose, all the urine of man during the whole year, and all the stale of beasts which they can save” to be donated to the saltpeter plantati...")
- 08:07, 4 February 2024 Book Notes (hist | edit) [51 bytes] Parijat (talk | contribs) (Created page with " * The Alchemy of Air (Book)")
- 01:37, 1 February 2024 Economics of Oil Refining (hist | edit) [3,653 bytes] Parijat (talk | contribs) (Created page with " == Architecture of an oil refinery == == Questions == * What is the average cost of setting up a basic oil refinery? * How long does it take to set up a plant? * How do you decide what products to produce. How does that affect (and is affected by) the kind of crude oil you process? * What are the different kinds of crude and where do they come from? How is pricing decided for different kinds of crude? * What kind of variation can you do in the output that your refi...")