Electro-therapy in gynæcology / by Samuel Sloan.

  • Sloan, Samuel, 1843-1920.
Date:
[1917]
Catalogue details

Licence: Public Domain Mark

Credit: Electro-therapy in gynæcology / by Samuel Sloan. Source: Wellcome Collection.

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    to make a neutral combination of hydrogen and oxygen two atoms of hydrogen are required for one atom of oxgyen. Thus the formula for water is H20. In the case of cupric chloride, copper being di-valent and chlorine mono-valent, two atoms of chlorine are required to neutralise one atom of copper; and so the formula for the neutral molecule is CuC]2. The importance of the valency of an element must be recognised when calculat¬ ing the total amount of that element which has been transferred by ionic penetration. Rations and Anions The electrons are given up at the poles only; where the ions, having lost their electric charges, assume their ordinary qualities—two atoms of the same element uniting to form an ordinary molecule of that substance, as we know it in nature. Or they may, as atoms, attach themselves to one or more of the atoms of the molecule water, and thus cause by secondary reaction decomposition of the water. Table III Examples of Rations and Anions. Electro-positives (kations). Copper Cocaine Zinc Strychnine Quinine Atropine Electro-negatives (anions). Chlorine Iodine Salicylic acid radical Sulphuric acid radical It was pointed out when dealing with electro-statics that similar charges repel and dissimilar charges attract each other ; and so is it in electro-dynamics. Negatively charged ions are repelled from the negative pole in an electrolyte and are attracted to the positive pole; posi¬ tively charged ions being repelled from the positive pole and attracted to the negative. The positive pole being called the anode and the negative pole the kathode, the negatively charged ions are therefore called anions or
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