in addition to the rates otherwise chargeable on such glass unsilvered: Provided, That no looking-glass plates or glass silvered, when framed, shall pay a less rate of duty than that imposed upon similar glass of like description not framed, but shall pay in addition thereto upon such frames, the rate of duty applicable thereto when imported separate.

94. Cast polished plate glass, silvered or unsilvered, and cylinder, crown, or common window glass, silvered or unsilvered, polished or unpolished, when bent, ground, obscured, frosted, sanded, enameled, beveled, etched, embossed, engraved, flashed, stained, colored, painted, ornamented or decorated, shall be subject to a duty of four per centum ad valorem in addition to the rates otherwise chargeable thereon.

95. Spectacles, eyeglasses, and goggles, and frames for the same, or parts thereof, finished or unfinished, thirty-five per centum ad valorem.

96. Lenses of glass or pebble, molded or pressed, or ground and polished to a spherical, cylindrical, or prismatic form, and ground and polished plano or coquill glasses, wholly or partly manufactured, thirty per centum ad valorem.

97. Strips of glass, not more than three inches wide, ground or polished on one or both sides to a cylindrical or prismatic form, including those used in the construction of gauges, and glass slides for magic lanterns, twenty per centum ad valorem.

98. Opera and field glasses, telescopes, microscopes, photographic and projection lenses and optical instruments and frames or mountings for the same; all the foregoing not specially provided for in this section, thirty per centum ad valorem.

99. Stained or painted glass windows, or parts thereof, and all mirrors, not exceeding in size one hundred and forty-four square inches, with or without frames or cases; and all glass or manufactures of glass or paste or of which glass or paste is the component material of chief value, not specially provided for in this section, thirty per centum ad valorem.

four square inches, eleven cents per square foot; above that, and not exceeding seven hundred and twenty square inches, thirteen cents per square foot; all above that, twenty-five cents per square foot: Provided, That no looking-glass plates or plate glass, silvered, when framed, shall pay a less rate of duty than thatimposed upon similar glass of like description not framed, but shall pay in addition thereto upon such frames the rate of duty applicable thereto when imported separate.

104. Cast polished plate glass, silvered or unsilvered, and cylinder, crown, or common window glass, silvered or unsilvered, polished or unpolished, when bent, ground, obscured, frosted, sanded, enameled, beveled, etched, embossed, engraved, flashed, stained, colored, painted, ornamented, or decorated, shall be subject to a duty of five per centum ad valorem in addition to the rates otherwise chargeable thereon.

105. Spectacles, eyeglasses, and goggles, and frames for the same, or parts thereof, finished or unfinished, valued at not over forty cents per dozen, twenty cents per dozen and fifteen per centum ad valorem; valued at over forty cents per dozen and not over one dollar and fifty cents per dozen, forty-five cents per dozen and twenty per centum ad valorem; valued at over one dollar and fifty cents per dozen, fifty per centum ad valorem.

106. Lenses of glass or pebble, molded or pressed, or ground and polished to a spherical, cylindrical, or prismatic form, and ground and polished plano or coquill glasses, wholly or partly manufactured, with the edges unground, forty-five per centum ad valorem; if with their edges ground or beveled, ten cents per dozen pairs and forty-five per centum ad valorem.

107. Strips of glass, not more than three inches wide, ground or polished on one or both sides to a cylindrical or prismatic form, including those used in the construction of gauges, and glass slides for magic lanterns, forty-five per centum ad valorem.

108. Opera and field glasses, telescopes, microscopes, photographic and projection lenses and optical instruments, and frames or mountings for the same; all the foregoing not specially provided for in this section, forty-five per centum ad valorem.

109. Stained or painted glass windows, or parts thereof, and all mirrors, not exceeding in size one hundred and fortyfour square inches, with or without frames or cases, and all glass or manufactures of glass or paste or of which glass or paste is the component material of chief value, not specially provided for in this section, forty-five per centum ad valorem.

100. Fusible, enamel, twenty per centum ad valorem; opal or cylinder glass tiles or tiling, thirty per centum ad valorem.

101. Marble, and breccia, in block, rough or squared only, fifty cents per cubic foot; onyx in blocks, rough or squared only, sixty-five cents per cubic foot; marble, breccia, and onyx, sawed or dressed, over two inches in thickness, seventy-five cents per cubic foot; slabs or paving tiles of marble or onyx, containing not less than four superficial inches, if not more than one inch in thickness, six cents per superficial foot; if more than one inch and not more than one and one-half inches in thickness, eight cents per superficial foot; if more than one and one-half inches and not more than two inches in thickness, ten cents per superficial foot; if rubbed in whole or in part, two cents per superficial foot in addition; mosaic cubes of marble or onyx, not exceeding two cubic inches in size, if loose, twenty per centum ad valorem; if attached to paper or other material, thirtyfive per centum ad valorem.

102. Marble, breccia, onyx, alabaster, and jet, wholly or partly manufactured into monuments, benches, vases, and other articles, or of which these substances or either of them is the component material of chief value, and all articles composed wholly or in chief value of agate, rock crystal, or other semiprecious stones, except such as are cut into shapes and forms fitting them expressly for use in the construction of jewelry, not specially provided for in this section, forty-five per centum ad valorem.

103. Freestone, granite, sandstone, limestone, lava, and all other stone suitable for use as monumental or building stone, except marble, breccia, and onyx, not specially provided for in this section, hewn, dressed, or polished, or otherwise manufactured, twenty-five per centum ad valorem; unmanufactured, or not dressed, hewn, or polished, five cents per cubic foot.

104. Grindstones, finished or unfinished, one dollar and fifty cents per ton.

105. Slates, slate chimney pieces, mantles, slabs for tables, roofing slates, and all other manufactures of slate, not specially provided for in this section, ten per centum ad valorem.

110. Fusible enamel, twenty-five per centum ad valorem; opal or cylinder glass tiles or tiling, sixty per centum ad valorem.

111. Marble and onyx, in block, rough or squared only, sixty-five cents per cubic foot; marble and onyx, sawed or dressed, over two inches in thickness, one dollar per cubic foot; slabs or paving tiles of marble or onyx, containing not less than four superficial inches, if not more than one inch in thickness, eight cents per superficial foot; if more than one inch and not more than one and onehalf inches in thickness, ten cents per superficial foot; if more than one and onehalf inches and not more than two inches in thickness, twelve and one-half cents per superficial foot; if rubbed in whole or in part, two cents per superficial foot in addition; mosaic cubes of marble or onyx, not exceeding two cubic inches in size, if loose, one-fourth of one cent per pound and twenty per centum ad valorem; if attached to paper or other material, five cents per superficial foot and thirty-five per centum ad valorem.

112. Marble, breccia, onyx, alabaster, and jet, wholly or partly manufactured into monuments, benches, vases, and other articles, or of which these substances or either of them is the component material of chief value, and all articles composed wholly or in chief value of agate, rock crystal, or other semiprecious stones, except such as are cut into shapes and forms fitting them expressly for use in the construction of jewelry, not specially provided for in this section, fifty per centum ad valorem.

114. Freestone, granite, sandstone, limestone, and all other monumental or building stone, except marble, breccia, and onyx, not specially provided for in this section, hewn, dressed, or polished, or otherwise manufactured, fifty per centum ad valorem: unmanufactured, or not dressed, hewn, or polished, ten cents per cubic foot.

115. Grindstones, finished or unfinished, one dollar and seventy-five cents per ton.

116. Slates, slate chimney pieces, mantels, slabs for tables, roofing slates, and all other manufactures of slate, not specially provided for in this section, twenty per centum ad valorem.