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385,269: 2 of 4

    3. As an improvement in illuminating tiles and wall-plates, a lens which upon one side is provided with radial ribs that transversely have the form of a pointed arch and at their outer ends are curved outward, substantially as and for the purpose set forth.
    4. As an improvement in illuminating tiles and wall-plates, a lens which upon one side is provided with radial ribs that transversely have the form of a pointed arch and at their outer ends are ribbed, substantially as and for the purpose shown and described.
    5. As an improvement in illuminating tiles 		and wall-plates, a lens which is provided upon one side with radial ribs that transversely have the form of a pointed arch and at their outer ends are curved outward and ribbed, substantially as and for the purpose specified.
    In testimony that I claim the foregoing I have hereunto set my hand this 1st day of December, A. D. 1887.
JACOB JACOBS.
Witnesses:
    GEO. S. PRINDLE,
    HENRY C. HAZARD.