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SEVENTY-FIRST C ONGRESS . SESS. II. CH. 497. 1930 . SCHEDULE z.
meat s for ophth almolo gical purpo ses, frames and mounti ngs t here- Earths,earthenware, and glassware,
for, and parts of any of the foregoing ; all the foregoing, finished or ~,
~ unfinished, 60 per centum ad valorem . Opt ical instruments . (b) Azimuth mirrors, parabolic or mangin mirrors for searchlight reflectors, mirrors for optical, dental, or surgical purposes, photo- graphic or projection lenses, sextants, octants, opera or field glasses (not prism binoculars), te lescopes, micros copes, all optica l instru- men ts, fra mes and mountings therefor, and parts of any of the foreg oing ; all the fore going, finished or unfinished, no t specially provided for, 45 per centum ad valorem . Electric lamps, etc .
PAR. 229 . Incandescent electric-light bulbs and lamps, without filam ents, 20 per centum ad valorem ; with metal filaments, 20 per cen tum ad valorem ; with filaments of carbon or other non-metallic material, 30 per centum ad valorem . Stained gla ss wi n- PAR. 230 . (a) Stained or painted glass windows, and parts thereof, doors, etc. not specially provided for, 60 per centuin ad valorem . Mir rors . (b) Glass mirrors (except framed or cased mirrors in chief value of platinum, gold, or silver), not specially provided for, not exceed- ing in size one hundred and forty-four square inches, with or without frames or cases, 50 per centum ad valorem . Ruled for photo- (c) Glass ruled or etched in any manner, and manufactures of graphic reproduction, such glass, for photographic reproductions or engraving processes, or for measuring or recording purposes, 55 per centum ad valorem . Not specially pro .
(d) All glass, and manufactures of glass, or of which glass is the vided for . component of chief value, except broken glass or glass waste fit only for remanufacture, not specially provided for, 50 per centum ad valorem . Cerami c colors, PAR. 231. Smalt s, fro sting s, and all cerami c and glass colo rs, smart s' etc '
fluxes, glazes, and enamels, all the foregoing, ground or pulverized, 30 per centum ad valorem ; in any other form, 40 per centum ad valorem ; opal, enamel or cylinder glass tiles and tiling, 40 per centum ad valorem . Marble, breccia, and onyx .
PAR. 232. (a) Marble, breccia, and onyx, in block, rough or squared , only, 65 cents per cubic foot ; marble, breccia, and onyx, sawed or dressed, over two inches in thickness, $1 per cubic foot . Slabs and paving tiles.
(b) Slabs and paving tiles of marble, breccia, or onyx : Containing . not less than four superficial inches, if not more than one inch in thickness, 8 cents per superficial foot ; if more than one inch and not more than one and one-half inches in thickness, 10 cents per super- ficial foot ; if more than one and one-half inches and not more than two inches in thickness, 13 cents per superficial foot ; in addition thereto on all the foregoing, if rubbed in whole or in part, 3 cents per super- ficial foot, or if polished in whole or in part (whether or not rubbed), 6 cents per superficial foot . Mosaic cubes . (c) Mosaic cubes of marble, breccia, or onyx, not exceeding two cubic inches in size, if loose, one-fourth of 1 cent per pound and 20 per centum ad valorem ; if attached to paper or other material, 5 c ents per superfi cial foot and 35 per centum ad va lorem . Manufactures of, not (d) Marble breccia and onyx, wholly or partly manufactured specially provided for . f ~ into monuments, benches, vases, and other articles, and articles of which these substances or any of them is the component material of c hief value, not specially provid ed for, 50 per ce ntum ad valorem . Al abaste r and jet . PAR . 233. Alabaster and jet, wholly or partly manufactured into mon uments, benches, vases, and other articles, and a rticles of which these substances or either of them is the component material of chief Se mipre cious stone value, and all articles composed wholly or in chief value of agate, article, rock crystal, or other semiprecious stone except such as are cut into shapes and forms fitting them expressly Yor use in the construction of jewelry, not specially provided for, 50 per centum ad valorem .
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