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(1) Further experimental investigations were made on the charge and discharge characteristics of the silver electrode of the cell which was constructed from the silver positive and the iron negative in KOH solution. (2) Silver oxide positive gives very high value of the coefficient of utility of the active material. (3) Discharge capacity and the utility coefficient are not seriously affected by the strength of the discharge current. (4) The oxygen fixed in the active material in the charged state is consumed completely in the succeeding discharge. (5) The amount of electricity charged is affected seriously by the strength of the charging current. (6) These phenomena can well be explained by the following chemical reactions. (Remark: Graphics omitted.)

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The crystal structure of calcium cyanamide has been studied by Dehlinger and Hanawalt, and later by Bredig1). Bredig reached the conclusion from his Debye-Scherrer X-ray analysis that the crystal structure of calcium cyanamide is based upon a rhombohedral lattice with