Certain imported merchandise described in the record as pyrite concentrate was classified by the collector of customs as “pyrites,” which are entitled to entry free of duty pursuant to the terms of paragraph 1777 of the Tariff Act of 1930 (19 U. S. C. § 1201, par. 1777). Treating the commodity as a lead-bearing'ore, the collector imposed duty upon the lead content of the importations at three-fourths of 1 cent per pound, as provided in paragraph 391 of said act (19 U. S. C. § 1001, par. 391), as modified by the trade agreement between the United States and the United Mexican States (78 Treas. Dec. 190, T. D. 50797).
The claim relied upon by plaintiff is that the entire commodity is entitled to free entry within the purview of said paragraph 1777.
The provisions of the statutes above cited read as follows:
Paragraph 1777 of the Tariff Act of 1930:
Sulphur in any form, and sulphur ore, such as pyrites or sulphide of iron in its natural state, and spent oxide of iron, containing more than 25 per centum of sulphur.
Paragraph 391 of said act, as modified, supra:
Lead-bearing ores, flue dust, and mattes of all
kinds...per lb. on the lead contained therein.
For convenient reference, we here quote paragraph 391 as it appears in the Tariff Act of 1930:
Pab. 391. Lead-bearing ores, flue dust, and mattes of all kinds, l}í cents per pound on the lead contained therein: Provided, That such duty shall not be applied to the lead contained in copper, gold, or silver ores, or copper mattes, unless actually recovered: Provided further, That on all importations of lead-bearing *57ores, flue dust, and mattes, of all kinds the duties shall be estimated at the port of entry and a bond given in double the amount of such estimated duties for the transportation of the ores, flue dust, or mattes by common carriers bonded for the transportation of appraised or unappraised merchandise to properly equipped sampling or smelting establishments, whether designated as bonded warehouses or otherwise. On the arrival of the ores, flue dust, or mattes at such establishments they shall be sampled according to commercial methods under the supervision of Government officers who shall be stationed at such establishments, and who shall submit the samples thus obtained to a Government assayer, designated by the Secretary of the Treasury, who shall make a proper assay of the sample and report the result to the proper customs officers, and the import entries shall be liquidated thereon. And the Secretary of the Treasury is authorized to make all necessary regulations to enforce the provisions of this paragraph.
At the trial, the following agreed statement of facts was entered into by the parties:
We stipulate that the imported product is sulphur ore, i. e., pyrites or sulphide of iron in its natural state, containing more than 25 per cent of sulphur.
We further stipulate that the imported product does not contain any lead that is commercially recoverable and that it contains the following percentages of lead:
.1 per cent in entry numbers 108, 1127, 1677, 2703, 3680, 4187, and 4390, and .09 per cent in entries 5289, 5354, 5456, 5788, 5973, 7509, and 8029. By that is meant l/10th of one per cent and 9/100ths of one per cent, respectively.
Plaintiff introduced the testimony of four well-qualified witnesses which is not refuted nor rebutted since no witnesses were called by defendant. Plaintiff’s witness Edward J. Langey testified that he was a geologist employed by the General Chemical Division of the Allied Chemical & Dye Corp. and that he was thoroughly familiar with the product known as a pyrite concentrate in controversy here and produced a sample typical of the importations, which was received in evidence as illustrative exhibit 1. In the opinion of this witness, the merchandise is not a lead-bearing ore because it is not one from which it would be commercially practical to recover the lead, and, as a matter of fact, his company imports the product for use in making sulphuric acid and does not procure any lead from it.
Speaking as a student of geology, Langey stated that the lead-bearing ores of commerce are what he termed “straight” lead ores from which the principal metal to be extracted is lead and various other ores, such as lead-zinc ores, and copper-gold-silver ores from which lead may be extracted. Langey would not regard merchandise represented by exhibit 1 as a lead-bearing ore in that it would not yield or produce merchantable lead, even though it actually contains from 0.09 to 0.1 percent of lead. He stated that the lead content of lead-bearing ores is from 4 to 5 percent and that the minimum lead content of any lead-bearing ores, within his knowledge, is from 2 to 3 percent; that 2 percent of lead content would be commercially recoverable in some circumstances, but a less content could not be extracted at a profit. He expressed the same opinion as to the pro*58duction of zinc from zinc-bearing ores. In all Ms experience, Langey knew of no instance in which it was possible to obtain lead economically from pyrites or any ore containing as little as 0.1 percent of lead.
Charles Gordon McLacMan, with a broad knowledge of metallurgy and mineralogy, testified that he was general superintendent of mills for Noranda Mines, Ltd.; that his company is engaged in the mining, milling, smelting, refinmg, and processmg of copper primarily, but also gold, silver, and selenium. He testified to his personal knowledge of the process by which the imported material was produced, having been employed as a metallurgical consultant by the East Sullivan Mrnes, Ltd., Yal D’Or, Quebec, where the merchandise was produced. He stated that the principal business of the East Sullivan Mines was the production of copper — “they are also recovering some gold and silver, which goes with the copper concentrate, and after they are recovered, then they also recover some zinc, and subsequently, after they had been in operation several months, they took in a circuit to recover pyrite.” In describing the process by which the subject merchandise is produced from copper ore, McLachlan testified—
* * * The ore containing the minerals I have mentioned is broken underground by blasting. It is then transferred to crushers, where it is reduced to about 8 inches in size. It is then hoisted to surface and then by further crushing operation, reduced to about one-half inch in size. From there it goes to grinding mills which pulverize the ore, and reduce it to the fineness in the order of that shown in Exhibit 1.
After the copper-bearing mineral is separated, the witness stated “Then we separate or recover by floatation the sphalerite, which is the zinc-bearing mineral, and after the copper and the zinc have been separated and recovered, then pyrite is floated from the residue which is left. * * * That then has to be filtered and dried and then loaded into cars for shipment.” This witness agreed with Langey that the merchandise in controversy is not a lead-bearing ore, because it does not contain lead in sufficient quantity to make its recovery commercially feasible; that, although there are minute quantities of lead in the copper ore, the most of it would be found in the copper concentrate, while the remainder would be found in the zinc concentrate — a very minute percentage remaining in the pyrite concentrate. McLachlan would regard 0.09 to 0.1 percent of lead m the imported concentrate a “trace.” TMs witness stated that he would not consider any ore as lead bearmg which had less than 2 percent of lead; that, whereas lead sulphide is a lead-bearing ore, pyrite is not a lead sulphide; it is an iron sulphide, FeS2.
On redirect exammation, McLacMan testified that the “planning” tests of the copper concentrate at the East Sullivan Mmes disclosed such a small amount of lead that “it did not warrant our asking the Assay Office to make a definite determination.” He *59agreed with Langey that, in his wide experience, he had never known of anyone attempting to recover lead commercially from pyrites or ore or minerals containing as little as 0.1 percent of lead.
Plaintiff’s third witness, F. R. Scherzinger, having had 40 years’ experience in the purchasing department of the General Chemical Division of Allied Chemical & Dye Corp., and presently chairman of the advisory purchasing committee, testified that he purchased the subject merchandise and produced the contract for the transaction, which was received in evidence as exhibit 2. On page -3 of the contract, the “quality” was set forth in the following terms:
The concentrate sold hereunder shall contain a minimum of forty-six per cent (46%) sulphur, dry basis, and shall be approximately of the following chemical and screen specifications:
Chemical Specification
S_46.0% Min. Si02_2.53% Insol_2.57% Cu_.30% A1203_2.85% Fe_44.41% MgO_Tr. CaO_Tr. As_Tr. Pb_Tr. Zn_ 1.22% Mn_Nil P less than_.005% Se_Nil Te_ Nil
Screen Specification
On 60 Mesh_ 0. 3%
“ 100 “ _•_ 1.3%
“ 200 “ 15.7%
“ 325 “ 18.5%
Through 325 “ 64.2%
100. 0%
Buyers reserve the right to reject any car or cars that do not conform to the above chemical and physical specifications
It will be noted that opposite the symbols “As” (arsenic) and “Pb” (lead) is the abbreviation “Tr.,” which the witness explained indicated that the presence of those two elements was deemed to be so slight as to be entirely disregarded.
On cross-examination, the witness testified, in substance, that his company would not accept pyrites if they contained 5 percent of lead, even though they carried the desired 46 percent of sulphur; that he would consider lead an impurity “in the manufacture of sulphuric acid.”
The last witness called by plaintiff was John Robert Edmonds, superintendent of the Buffalo works of the General Chemical Division of Allied Chemical & Dye Corp., a concern which produces sulphuric acid. He was shown to be an experienced practical chemist, familiar with the processes employed by his company in producing sulphuric *60acid from the imported pyrite concentrate; that the pyrites are heated and, by the injection of air, oxidization occurs, forming sulphur dioxide, from which sulphuric acid is produced; that, when the sulphur dioxide is formed, the remaining material is waste in the form of a cinder containing a percentage of iron, which is of no further use to his concern but may be utilized to a limited extent in the production of cement and steel. Edmonds agreed with the previous witnesses that, by reason of the small fractional percentage of lead in the imported commodity, it was not recovered because there is no economical way of dealing with such a minute quantity.
It is clear from the foregoing résumé of the testimony of four experienced and highly qualified witnesses that the amount of lead in the imported product, ranging from 0.09 to 0.1 percent, is regarded by them as a “trace” which could not be economically recovered and, hence, is there merely as an impurity; that the primary purpose for which the commodity is imported is for the production of sulphuric acid therefrom, the only byproduct of any possible value being what the evidence discloses to be a cinder containing a certain percentage of iron; that the presence of lead in pyrites used for the production of sulphuric acid would be regarded as an impurity and, hence, objectionable.
It appears further from the record that the lead-bearing ores of commerce are those where the average lead content is from 4 to 5 percent with a minimum of 2 to -3 percent from which lead may be extracted profitably. None of the witnesses knew of any pyrites or any other ore or mineral containing as little as 0.1 percent of lead from which the leoad could be extracted economically.
Upon the foregoing factual basis, which is not controverted, the problem which confronts us is whether the imported commodity is, in its entirety, entitled to free entry as “pyrites or sulphide of iron in its natural state,” as provided in paragraph 1777, supra, or whether it should be regarded as a lead-bearing ore and, consequently, subject to the imposition of duty at the rate of three-fourths of 1 cent per pound “on the lead contained therein” pursuant to the terms of paragraph 391, as modified, supra.
Plaintiff argues first that the imported material is not a lead-bearing ore, inviting our attention to various definitions of the word “ore,” and contends that these definitions confirm the views expressed by the witnesses that the quantity of lead in the importation is such a small percentage that it may be appropriately described as a trace and, hence, ignored in the classification of the commodity for duty purposes.
Following are some of the definitions quoted by plaintiff:
Webster’s New International Dictionary (1950 edition):
Ore. 1. A natural or native mineral that, usually may be profitably mined and treated for the extraction of any of its constituents. 4. Any material con*61taining valuable metallic constituents for the sake of which it is mined and worked; thus, cinnabar is an ore of mercury; less commonly, material mined and worked for nonmetals, but not including material, such as placer gravels, that may contain gold, tin, platinum, etc.; thus, pyrites is a sulphur ore. The term ore has usually been applied, among miners, to the crude material obtained without other than hand sorting of the lumps. Although not strictly correct, ore, for want of a more appropriate term, is often applied to nonmetalliferous material, as sulphur, fluorite, etc.
Oxford Universal English Dictionary, volume YI:
Ore — a native mineral containing a precious or useful metal in such quantity, etc., as to make its extraction profitable.
Standard Dictionary of the English Language:
Ore — A natural substance, sometimes forming part of a rock, containing one or more metals. The term is applied usually to a mineral from which the metal can be profitably extracted, but is sometimes extended also to non-metallic minerals; as sulphur ore.
Encyclopaedia Britannica — 14th edition, volume 16, page 874:
The word “ore” is defined in the Oxford Dictionary as “a native mineral containing a precious or useful metal in such quantity or in such chemical combination as to make its extraction profitable,” and that is the sense in which it is used in commerce or by miners, although writers on mineralogy and petrology apply the word to metalliferous minerals without the above-named limitations.
Encyclopedia Americana — 1932:
ore. An ore may be defined as any mineral or aggregation of minerals from which metal or metals can be extracted at a profit.
Numerous other definitions, quoted by plaintiff from works on metallurgy, mining, and the mineral industry, are of the same tenor.
Plaintiff then cites Harshaw, Fuller & Goodwin Co. v. United States, 11 Ct. Cust. Appls. 3, T. D. 38634, wherein our appellate court referred with apparent approval to dictionary definitions of the word “ore” as substances from which metals or minerals may be extracted at a profit and which are mined for the sake of their valuable constituents. See also Nichols Copper Co. v. United States, 6 Cust. Ct. 158, C. D. 453, reversed in 29 C. C. P. A. (Customs) 186, C. A. D. 190, but on other grounds.
Upon the foregoing authorities, plaintiff contends that “the witnesses, the dictionaries, the encyclopedias, the text books and even the decisions of this court — indicates conclusively that in common parlance as well as by commercial practice, an ore is a metallic or mineral substance which is mined to obtain a valuable metal or mineral at a profit.”
Plaintiff then invokes the doctrine of de minimis non curat lex.
A liberal translation of this legal maxim means that the law does not concern itself with trifles, and, applying this principle to the facts of the instant case, plaintiff insists with plausibility that, since the *62importations show the presence of only 0.09 to 0.1 percent of lead which was “unsought, unwanted, useless, unrecoverable and actually detrimental,” it should be disregarded.
In support of this doctrine, plaintiff cites the case of United States v. McLaughlin & Freeman, 13 Ct. Cust. Appls. 404, 406, T. D. 41324, from which the following statement of the court is quoted:
The importation is sweetened chocolate which contains 0.6 of 1 per centum by weight of crushed almonds. That small percentage of almonds was probably added for flavoring purposes, but whether it was or not, it can not be said the almonds were a distinctive feature of the product or that their introduction created a product which was not entitled to bear the name of sweetened chocolate. Six-tenths of 1 per centum by weight of almonds was negligible in the commodity and no more removed the commodity from the common understanding of chocolate than would the addition of 0.6 of 1 per centum of vanilla extract or almond oil.
Reference is also made by plaintiff to Schenkers (Inc.) v. United States, 69 Treas. Dec. 1257, T. D. 44916, and R. W. Gresham v. United States, 3 Cust. Ct. 308, C. D. 263, wherein this court applied the de minimis rule.
The defendant insists that the language of paragraph 391, supra, makes it imperative that duty should be levied upon the content of lead in the imported commodity. It is argued that since the paragraph provides for “Lead-bearing ores, * * * 1}( cents per pound on the lead contained therein: Provided, That such duty shall not be applied to the lead contained in copper, gold, or silver ores, or copper mattes, unless actually recovered: * * *” the quoted language clearly indicates the exceptions which Congress had in mind “with respect to when the duty should not be applied.”
Defendant also invites our attention to the provision in paragraph 393 of said act (19 U. S. C. § 1001, par. 393), which reads:
Pak. 393. Zinc-bearing ores of all kinds, except pyrites containing not more than 3 per centum zinc, l}i cents per pound on the zinc contained therein: Provided, That such duties shall not be applied to the zinc contained in lead or copper ores unless actually recovered: * * *.
Since Congress expressly excepted from duty not only the zinc contained in lead or copper ores, unless actually recovered, and also excepted pyrites containing not more than 3 per centum of zinc, defendant contends that the language of paragraphs 391 and 393, supra, points to the fact that if Congress intended to except from duty lead-bearing ores containing a small percentage of lead it would have made a specific exception to that effect in paragraph 391 similar in terms to that in respect to zinc-bearing ores in said paragraph 393.
While it is true, as stated in defendant’s brief, that the Harshaw and Nichols cases, supra, did not present the same issues as are before us here, they do, nevertheless, lend support to the contention of plaintiff with respect to the common meaning of the term “ore.”
*63However, our main concern here is whether or not the imported pyrite concentrate is, in fact, a lead-bearing ore within the scope of that term, as used in paragraph 391, supra. We believe that question is resolved by the unrefuted testimony of experienced men who are learned in the sciences dealing especially with geology, metallurgy, and mineralogy to the effect that the importations are not lead-bearing ore, in fact or in any true sense of the term, and we so find. The amount of lead present is what scientists would characterize as a mere trace, which is regarded as a negligible quantity, and, under the rule de minimis, should be ignored in the classification of the merchandise.
Upon the record before us, we find and hold as a matter of law that the subject merchandise is not a lea.d-bearing ore within the sense of paragraph 391 and that duty was improperly assessed thereon. The claim of plaintiff that the entire commodity is entitled to free entry, pursuant to the terms of paragraph 1777, supra, is sustained.
Judgment will be entered accordingly.