Isolated faces of copper single crystals were plated with copper from copper sulfate‐sulfuric acid solutions. Deposits on {100} and {110} faces, despite the presence of grain boundaries, gave x‐ray diffraction patterns showing uniform lattice orientation. The grain boundaries were associated with topographic features of the deposits. Over‐all metal distribution showed a tendency to deviate from that of poly crystal deposits on polycrystalline bases.

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