Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . TROUGH BATTERY. 31 whole may be used as a single series of one hundredpairs, or as a battery of fifty pairs of double size, byestablishing proper connections between these only half the battery may be put in action, eachhaving a separate trough to contain the acid. Theplates are stationary, and the troughs are raised up tothem by means of two racks moved by the crankand handle, H, which lift the platform on which the Fig. xy —^ troughs st
Davis's manual of magnetism : including galvanism, magnetism, electro-magnetism, electro-dynamics, magneto-electricity, and thermo-electricity . TROUGH BATTERY. 31 whole may be used as a single series of one hundredpairs, or as a battery of fifty pairs of double size, byestablishing proper connections between these only half the battery may be put in action, eachhaving a separate trough to contain the acid. Theplates are stationary, and the troughs are raised up tothem by means of two racks moved by the crankand handle, H, which lift the platform on which the Fig. xy —^ troughs stand. Either trough may be removed fromthe platform at pleasure, when it is wished to useonly half of the battery. 48. In the cut, the arrangement for producing thearch of flame between charcoal points is shown. Twopointed pieces of prepared boxwood charcoal are fixedin the pincers at A, and, the battery being put inaction, are brought in contact. The spark passes,and the points become ignited. They may then be 2f2 DAVIS* S MANUAL. separated to a greater or less distancej in proportionto the power of the battery; and the current willcontinue to flow through the interval with the pro-duction of intense light and heat. This experiment,as well as the deflagration or destructive combustionof metals, is performed with facility by a series ofGroves battery. 49. In the batteries just described, in which theplates are fixed permanently in a frame, the solutionof sulphate of copper cannot be employed, on accountof the deposit which it forms. Hence diluted acidis used; and the
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Keywords: ., bookcentury1800, bookdecade1850, booksubjectmagnetism, bookyear18
