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2 ideas
15951 | Alchemists tried to separate out essences, which influenced later chemistry [Alexander,P] |
Full Idea: The alchemists sought the separation of the 'pure essences' of substances from unwanted impurities. This last goal was of great importance for the development of modern chemistry at the hands of Boyle and his successors. | |
From: Peter Alexander (Ideas, Qualities and Corpuscles [1985], 01.1) | |
A reaction: In a nutshell this gives us the reason why essences are so important, and also why they became discredited. Time for a clear modern rethink. |
11043 | It is not possible for fire to be cold or snow black [Aristotle] |
Full Idea: It is not possible for fire to be cold or snow black. | |
From: Aristotle (Categories [c.331 BCE], 12b01) |