Lectures on electricity, comprising galvanism, magnetism, electro-magnetism, magneto- and thermo-electricity / By Henry M. Noad ; illustrated by nearly three hundred wood cuts.

  • Henry Minchin Noad
Date:
1844
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Licence: Public Domain Mark

Credit: Lectures on electricity, comprising galvanism, magnetism, electro-magnetism, magneto- and thermo-electricity / By Henry M. Noad ; illustrated by nearly three hundred wood cuts. Source: Wellcome Collection.

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    LE C TURES ON ELECTRICITY, GALVANISM, &c. LECTURE I. ELECTRICITY. Historical Sketch—Primary phenomena—Electric light—Conductors and non¬ conductors—The terms Vitreous and Resinous, and Positive and Negative—One kind of Electricity cannot be produced without the other—Electroscopes — Electricity set in motion by every form of mechanical change—Attraction and repulsion — Coulomb’s electrometer — Distribution of Electricity — Intensity of Electricity distributed on the surfaces of bodies dependent on their forms — Induction — The gold leaf electroscope—Electrophorus—Faraday’s experi¬ ments and new views of the nature of inductive action — Application thereof to the explanation of electrical phenomena—Theory of the condenser—Practical demonstration of the mechanism of inductive action — Electrical machines — —Amalgam—Theory of the action of the electrical machine—Experiments illustrating the principle and action of the electrical machine. (1) There is perhaps no branch of experimental philosophy which is received by persons of all ages with greater pleasure than Electricity. The reasons are obvious. It is the science susceptible of the most familiar demonstration, and its phenomena, from the striking and ocular manner in which they are presented, are calculated to arrest the attention and become fixed on the mind more powerfully than those of any other science. To this may be added its connexion with the most sublime and awful of the agencies of nature; its secret and hidden influence in promoting at one time the decomposition of bodies, and at another time their re-formation; at one time, in its current form causing the elements of water to separate, and exhibiting them in the form of gases; and at another time, in its condensed form causing these same gases to re-unite, and become again identified with water; nowT, in its B
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