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I'm obsessed with Islamic culture these days.Muslim astronomers created calendars, compiled almanacs and orientation guides, and advanced the practice and theory of astronomical observation, while they also invented a large number of astronomical instruments and devices. In chemistry, Arab alchemy drew on Chinese Taoist alchemy, discovered sulphuric acid and nitric acid, and improved the methods of purification, melting and crystallisation of metals, and revised Aristotle's doctrine on the composition of metals, and Arab alchemy writings were regarded as classics by European chemists.
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