SEVENTY-FIRST CONGRESS . SEss . II . Cs. 497. 1930.
607 (b) Plate glass containing a wire netting within itself, not exceed-
BcsEDULE 2. ing three hundred and eighty-four square inches, 15 cents per square Earths, earthenware, and glassware . f oo t ; above that, an d not exceeding seven hundred and twenty square With wire nettin g . inches, 20 cents per square foot ; all above that, 23 cents per square foot . (c) The term "plate glass," when used in this Act, means glass g l eaning or plat e wholly ground and polished on both surfaces . (d) Rolled, cylinder, cr own, and sheet glass, not pl ate glass, if Rolled glass . ground wholly or in part (whether or not polished) otherwise than for the purpose of ornamentation, or if one-fourth of one inch or more in th ickness and obscured by color ing prior to solidification, shall be subject to the duties provided in subparagraph (a) or (b) of this paragraph ; if any of the foregoing is subjected to any of the processes specified in paragraph 224, the additional duty provided therein shall apply . PAR. 22 3 . Plat e, cylinder, crown, and s heet glass, b y whatever gl S ilvered plate, etc ., process made, when made into mirrors, finished or partly finished, exceeding in size one hundred and forty-four square inches and not exceeding three hundred and eighty-four square inches, 15 cents per s q ua r e fo o t ; ab ove that, and not exceeding seven hundred and twenty square inches, 20 cents per square foot ; all above that, 23 cents per j square foot : Provided, That none of the foregoing shall be subject Minimum duty. to a less rate of duty than 45 per centum ad valorem : Provided fur- ther, That none of the foregoing mirrors when framed shall be sub- Framed mirrors . ect to a less rate of duty than that imposed upon similar mirrors of like description not framed, but shall pay in addition thereto upon suc h frames the rate of duty applica ble there to when imported separately . PAR . 224 . Plate, rolled, cylinder, crown, and sheet glass, and glass etBeplato, etc, glass . ' mirrors exceeding in size one hundred and forty-four square inches, by whatever process made, when bent, frosted, sanded, enameled, beveled, etched, embossed, engraved, flashed, stained, colored (except glass not plate glass and not less than one-fourth of one inch in thickness, when obscured by coloring prior to solidification), painted, ornamented , or decorated, shall be subj ect to a duty of 5 per centum ad valorem in addition to the rates oth erwise chargeable thereon . PAR . 225. Spectacles, eyeglasses, and goggles, and frames for the Spectacles, etc. same, or parts thereof, finished or unfinished, valued at not over 65 cents per dozen, 20 cents per dozen and 15 per centum ad valorem ; valued at over 65 cents per dozen and not over $2 .50 per dozen, 60 cents per dozen and 20 per centum ad valorem ; valued at over $2 .50 per dozen, 40 per centum ad valorem . PAR . 22 6 . Lenses of glass or pebble, molded or p ressed, or ground Lenses, etc' and polished to a spherical, cylindrical, or prismatic form, and ground and polished piano or coquille g lasses, wholly or partly man- ufactured, with the edges unground, 40 per centum ad valorem ; with the e dges ground o r beveled, 10 cents per d ozen pairs an d 35 per centum ad valorem ; 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, 35 per centu m ad valorem . PAR . 227. Optical glass or glass used in the manufacture of lenses optical class . or prisms for spectacles, or for optical instruments or equipment, or for optical parts, scientific or commercial, in any and all forms, 50 per centum ad va lorem . PAR. 228. (a) Spectrographs, spectrometers, spectroscopes, refract- Scientific meters, etc. ete. tometers, saccharimeters, colorimeters, prism-binoculars, cathetome- ters, interferometers, haemacytometers, polarimeters, polariscopes, ph otom eter s, o phth almo scop es, slit la mps, cor neal mic rosc opes , op tica l measuring or optical testing instruments, testing or recording instru-
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