Calcarea Fluorica
By Constantine Hering โ The Guiding Symptoms of our Materia Medica
"1. By internal evidence ; the symptoms were mostly new to the provers and arose without any apparent cause.
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By repetition of the same symptoms in the same provers.
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By striking likeness of some of those symptoms to the symptoms of Calcarea ostrearum, particularly those of the mind and larynx.
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By equally marked similarity of symptoms to those of Fluoric acid (vivid dreams of new scenes, death of relatives, and of the cadaver).