. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . Fig. 28 WfiOLS CARBOSCLP: + Z/C. Plunge batterj-. Cell -with porous partition. The Daniell Cell.—In the Daniell cell the copper plate is immersed in asolution of copper sulphate and the zinc plate in dilute sulphuric acidor a zinc sulphate solution, the Hquids being separated by a porouspartition as in the cell described above. Copper instead of hydrogen ishberated at the positive plate, and therefore there is no polarization.The porous partition is used to keep the copper sulphate from contactwit
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. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . Fig. 28 WfiOLS CARBOSCLP: + Z/C. Plunge batterj-. Cell -with porous partition. The Daniell Cell.—In the Daniell cell the copper plate is immersed in asolution of copper sulphate and the zinc plate in dilute sulphuric acidor a zinc sulphate solution, the Hquids being separated by a porouspartition as in the cell described above. Copper instead of hydrogen ishberated at the positive plate, and therefore there is no polarization.The porous partition is used to keep the copper sulphate from contactwith the zinc plate, because the direct chemical action between themwould result in coating the zinc ith a layer of copper, thus destroyingthe efficiency of the cell. In another form of the Daniell cell which is often used, the porouscup is dispensed with and the hquids are kept separated by their dif-ferent specific gra-ity. In this form of cell, which is known as a graniy > In this form of cell nitric acid is sometimes used as the depolarizer. The cell is then known as theBunsen cell. 58 THE ELECTRIC CURRENT cell (Fig