. The Ontario high school physics. CELLS 407. N—^^SL 481. The Dry Cell. The so-called dry cell is a modifiedform of the Leclanchd cell. The carbonplate C (Fig. 492) is closely surroundedby a thick paste, A, composed chieflyof powdered carbon, manganese dioxideand amnionic chloride. This is all con-tained in a cylindrical zinc vessel, Z,which acts as the negative pole of thecell. Melted pitch, P, is poured ontop in order to prevent evaporation, Fio. dry cell. i e., to prevent the cell from becoming really dry. 482. Edison-Lalande Cell. In this cell one plate consists ofcompressed finely-
. The Ontario high school physics. CELLS 407. N—^^SL 481. The Dry Cell. The so-called dry cell is a modifiedform of the Leclanchd cell. The carbonplate C (Fig. 492) is closely surroundedby a thick paste, A, composed chieflyof powdered carbon, manganese dioxideand amnionic chloride. This is all con-tained in a cylindrical zinc vessel, Z,which acts as the negative pole of thecell. Melted pitch, P, is poured ontop in order to prevent evaporation, Fio. dry cell. i e., to prevent the cell from becoming really dry. 482. Edison-Lalande Cell. In this cell one plate consists ofcompressed finely-ground copper oxide powder fitted in a lightcopper frame. On each side of this is a plate of zinc wellamalgamated. The exciting li(]uid consists of one part ofcaustic soda dissolved in three parts by weight of water. Toprevent it from being acted upon by the carbonic acid of theair it is covered with a layer of petroleum. The is low, about volt, but the internal resistanceis also low; such a cell can deliver a powerful current (
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectphysics
