Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . ires, each connectedwith a small screw-cup, entering onopposite sides. These wires are in-sulated, except at the extremities,which are flattened into little discs,and are parallel to each other. Whena current of almost inappreciablequantity passes, as that from a gal-vanic pair composed of a zinc and asilver wire, whose extremities are dipped into dis-tilled water, or from two or three turns of a smallelectrical machine, one of these discs will be see
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . ires, each connectedwith a small screw-cup, entering onopposite sides. These wires are in-sulated, except at the extremities,which are flattened into little discs,and are parallel to each other. Whena current of almost inappreciablequantity passes, as that from a gal-vanic pair composed of a zinc and asilver wire, whose extremities are dipped into dis-tilled water, or from two or three turns of a smallelectrical machine, one of these discs will be seen,when compared in the light with the other, to be-come of a purple hue, the eflect constantly increasingas the current is continued. The disc recovers itsbrightness by stirring the solution near it, or on beingtouched with a little splintei of wood. 67. Most of the salts having alkaline bases aredecomposed into an acid and an alkali, which appearat the opposite poles. Some of the phenomenaoccasioned in this way are best observed by placinga porous diaphragm across the decomposing cell, soas to form separate apartments for the poles. GA I. VANO—DECOMPOSITION. 45
Size: 1326px × 1884px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
