"I watched Baeyer activating magnesium with iodine for a difficult Grignard reaction; it was done in a test tube, which he watched carefully as he moved it gently by hand over a flame for three quarters of an hour. The test tube was the apparatus to Baeyer."

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Thinking gives off smoke to prove the existence of fire. A mystic sits inside the burning. There are wonderful shapes in rising smoke that imagination loves to watch. But it's a mistake to leave the fire for that filmy sight. Stay here at the flame's core.

— Rumi