are indications of keen insight which go some way towards explaining his success as a physician; for it cannot he doubted that he did effect many remarkable cures. His European fame was not won by mere boasting. His treatise, De Morbis ex Tartare oriundus, is admittedly full of sound sense.
Some of his chemical observations are startling for their anticipations of later discoveries. If there were no air, he says, all living beings would die. There must be air for wood to burn. Tin, calcined, increases in weight; some air is fixed on the metal. When water and sulphuric acid attack a metal there is effervescence; that is due to the escape of some air from the water. He calls metals that have rusted, dead.
Saffron of Mars (the peroxide) is dead iron. Verdigris is dead copper. Red oxide of mercury is dead mercury. But, he adds, these dead metals can be revivified, "reduced to the metallic state," are his exact words (and it is to be noted that he was the first chemist to employ the term "reduce" in this sense), by means of coal. Elsewhere he describes digestion as a solution of food; putrefaction as a transmutation. He knew how to separate gold from silver by nitric acid. It is quite certain that the writer of Paracelsus's works was a singularly observant and intelligent chemist. He had "a wolfish hunger after knowledge," says Browning.
"Have you heard," wrote Gui Patin to a friend a hundred years after the death of the famous revolutionary, "that 'Paracelsus' is being printed at Geneva in four volumes in folio? What a shame that so wicked a book should find presses and printers which cannot be found for better things. I would rather see the Koran printed. It would not deceive so many people. Chemistry is the false money of our profession."
