Potassium

Potassium cyanide, says the

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Potassium cyanide, says the talent wrangler as she leans over to pick up a paper napkin off the floor. Found naturally in the cassava or manioc roots native to Africa, used to tint architectural blueprints in the form of the deep-blue pigment known as Prussian blue. Hence the shade ‘cyan’ blue. Chuck Palahniuk

Taking advantage of the

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Taking advantage of the method, found by me, of the black staining of the elements of the brain, staining obtained by the prolonged immersion of the pieces, previously hardened with potassium or ammonium bichromate, in a 0.50 or 1.0% solution of silver nitrate, I happened to discover some facts concerning the structure of the cerebral … Read more

I am delighted that

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I am delighted that I have found a new reaction to demonstrate even to the blind the structure of the interstitial stroma of the cerebral cortex. I let the silver nitrate react with pieces of brain hardened in potassium dichromate. I have already obtained magnificent results and hope to do even better in the future. … Read more