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under surface, arranged one behind the other, the reflecting-surface of one prism being at an angle of substantially forty-five degrees to the horizontal, and the reflecting-surface of the other prism being at an angle of substantially fifty degrees to the horizontal, the said prisms reflecting the rays of light in the same general direction, and each having a non-reflecting surface in front of the reflecting-surface, the said tile having its upper surface set at an angle to the upper line of the said prisms, substantially as described.
    3. A glass tile, having two prisms on its under surface, arranged one behind the other, the reflecting-surface of one prism being at an angle of substantially forty-live degrees to
the horizontal, and the reflecting-surface of the other Prism being at an angle of substantially fifty degrees to the horizontal, the said prisms reflecting the rays of light in the same general direction, and each having a non-reflecting surface in front of the reflecting-surface, the said tile having a rabbet formed thereon above the upper line of the prisms, whereby the whole volume of light may be transmitted, substantially as described.
    Toronto, October 29, 1895.
JAMES G. PENNYCUICK.
In presence of--
    F. W. BARRETT,
    D. P. KENNEDY.