Elements of Chemistry in Which the Recent Discoveries in the Science Are Includ
Elements of Chemistry in Which the Recent Discoveries in the Science Are Includ
J L John Lee Comstock
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The proportions are 272 parts, or 1 equivalent of the corrosive sublimate, and 200 parts, or I equivalent of the mercury. This process affords a beautiful illustration of the truth of the doctrine of definite proportions ; for when these equivalents are mixed in a mortar, and then sublimed by heat, 36 parts, or 1 proportion of the chlorine is transferred from the bi- chloride to the metallic mercury, thus converting the w r hole into 472 parts of protochloride of mercury, or calomel. This proce...ss also shows, in a striking manner, the effects of different proportions of the same principles, on the quali- ties of bodies. Corrosive sublimate is one of the most active and virulent, of all metallic poisons, and in doses of only a few grains, occasions the most agonizing symptoms, which com- monly end in death. But calomel is a mild and safe medi- cine, which maybe taken in doses of 60, or even 100 grains, without injury. And yet the only chemical difference between these two substances is, that the calomel is a compound of 1 atom, of chlorine combined with one of mercury, while corro- sive sublimate consists of 2 atoms of the first and 1 of the metal.
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