The decision of this case depends upon the construction of the tariff act of March 3, 1883, (22 St. 488.) Schedule J of this act (page 507) provides for a duty of 40 per cent. ad valorem upon 'flax or linen thread, twine, and pack thread, and all manufactures of flax, or of which flax shall be the component material of chief value, not specially enumerated or provided for in this act;' while a subsequent paragraph of the same schedule imposes a duty of 25 per cent. ad valorem upon 'seines and seine and gilling twine.' The question is, to which category, under the finding of facts, these goods are to be assigned. We think the following extract from the finding is decisive in favor of the position taken by the plaintiff in error: 'For many years before the tariff act of 1883, this kind of thread, of the manufacture of W. & J. Knox, and other foreign makers, was imported under the name of 'gilling twine,' to be used in making gill-nets, and was invoiced and entered at the custom-house under that name, and was so designated on price-lists and trade circulars of the foreign makers. For many years before the act no other imported article was known by the special name of 'gilling twine."

It is a cardinal rule of this court that, in fixing the classification of goods for the payment of duties, the name or designation of the goods is to be understood in its known commercial sense, and that their denomination in the market when the law was passed will control their classification without regard to their scientific designation, the material of which they may be made, or the use to which they may be applied. Two Hundred Chests of Tea, 9 Wheat. 430, 438; U. S. v. Casks of Sugar, 8 Pet. 277; Elliott v. Swartwout, 10 Pet. 137; Curtis v. Martin, 3 How. 106; Arthur v. Morrison, 96 U. S. 108; Swan v. Arthur, 103 U. S. 597; Schmieder v. Barney, 113 U. S. 645, 5 Sup. Ct. Rep. 624; Arthur v. Butterfield, 125 U. S. 70, 8 Sup. Ct. Rep. 714; Robertson v. Salomon, 130 U. S. 412, 9 Sup. Ct. Rep. 559.

It must be assumed that congress, in imposing a duty upon 'gilling twine' eo nomine, intended that some article used for the purpose of manufacturing gill-nets should pay duty as such; and as the article in question is and was for many years before the act was passed imported, invoiced, and entered at the custom-house under that name, and was so designated in price-lists and trade circulars, and was actually intended for use in the manufacture of gill-nets, and no other article was imported under that name, it follows that it should be classified as such, notwithstanding it is in fact linen thread, and, when intended for sewing purposes, is invoiced and entered as linen thread.

The argument for the higher duty is based upon the finding that the article is not twine, is not suitable for the purposes to which twine is commonly put, because made of flax from which the gum has been removed by boiling, and is flexible, without the stiffness of twine, highly finished, capable of being used for sewing, and largely used for machine sewing in many trades. It would seem to follow from this that, in the opinion of the court below, twine must be stiff, and contain a certain quantity of gum, as the most ordinary form of twine for wrapping parcels undoubtedly does. But these qualities are not essential to twine, which is defined by Webster as 'a strong thread, composed of two or three smaller threads or strands twisted together, and used for various purposes, as for binding small parcels, making nets, and the like; a small cord or string.' If in fact twine were necessarily stiff, and contained an infusion of gum, there could be no such thing as 'gilling twine,' since, for the purpose of gillnets, linen thread must combine the utmost possible flexibility of movement with lightness of texture, strength, and invisibility. It is stated in the opinion of the general appraisers at New York of December 4, 1980, referred to in the brief of counsel, that 'the action of the water would kink the hard twisted thread, and dissolve the gum or sizing, thus rendering the nets made therefrom comparatively worthless.' It should be so light as to float in the current, so fine and so near the color of the water as to be invisible, and so strong that when the fish are caught by the gills they are held by the tenacity of the thread. It is undoubtedly thread, and the finding is that homemade linen thread used for gilling purposes is invariably (and more properly) called 'gilling thread;' never 'gilling twine.' We are bound, however, to give some effect to the words 'gilling twine;' and, if there be no other imported article of that name, it follows conclusively that this must have been the article intended. Nor is this inference greatly weakened by the fact that the article is nothing less than linen thread, differing not in material, quality, or mode of manufacture from other similar thread, that nine-tenths of the thread so imported is used for other purposes than gilling, and that when so imported it is invoiced and entered as linen thread, and is so known in commerce, and designated on price-lists and trade circulars.

It would appear, from the treasury reports and circulars, to admit of some doubt whether there is an absolute identity between the thread used for gilling and that used for sewing; but it is not necessary for us to determine whether the same duty should be imposed, if the same article be imported for different purposes. Of course, this would follow only in case the two articles were absolutely identical, and if, as found by the board of general appraisers of New York, to which reference has already been made, the difference between the two is so marked as to render them easily separable, the question of identity would not arise. It was found by them that the machine thread is a harder twist, and contains more sizing, than the gilling, and that the former could not be satisfactorily used for the manufacture of gill-nets.

It is sufficient, for the purposes of this case, to hold that, when imported as gilling, for the manufacture of gill-nets, it is liable only to the duty of 25 per cent.

While the statements made and the opinions advanced by the promoters of the act in the legislative body are inadmissible as bearing upon its construction, yet reference to the proceedings of such body may properly be made to inform the court of the exigencies of the fishing interests, and the reasons for fixing the duty at this amount. Jennison v. Kirk, 98 U. S. 453, 459; Blake v. Bank, 23 Wall. 307, 317; Collector v. Richards, Id. 246, 258; Gilmer v. Stone, 120 U. S. 586, 590, 7 Sup. Ct. Rep. 689; U. S. v. Railroad Co., 91 U. S. 72, 79. It seems that the duty upon seines was originally fixed at six and one-half cents per pound; when, upon representations of the fishermen upon the lakes, who use seines and gill-nets which are only made of Scotch and Irish flax, and always from imported twine, that they were suffering from the competition of Canadian fishermen, who imported their twine free of duty, and found a ready sale for their fish in American ports, also free of duty, an effort was made to put seines and seine gilling twine on the free-list; but the matter was finally compromised by fixing the duty at 25 per cent. ad valorem. Unless this be held to include the thread of which these gill-nets are actually made, the intention of congress will evidently be defeated.

While, in the absence of a more specific designation, this article might properly be classed as 'linen thread,' it is a familiar rule in revenue cases that, where congress has designated an article by a specific name, and imposed a duty upon it, general terms in the same act, though sufficiently broad to comprehend such article, are not applicable to it; in other words, the article will be classified by its specific designation, rather than under a general description. Homer v. Collector, 1 Wall. 486; Arthur v. Lahey, 96. U. S. 112; Arthur v. Stephani, Id. 125; Movius v. Arthur, 95 U. S. 144.

We think the intention of congress that these goods should be classified as 'gilling twine' is plain; but, were the question one of doubt, we should still feel obliged to resolve that doubt in favor of the importer, since the intention of congress to impose a higher duty should be expressed in clear and unambiguous language. U. S. v. Isham, 17 Wall. 496; Hartranft v. Wiegmann, 121 U. S. 609, 7 Sup. Ct. Rep. 1240; Gurr v. Scudds, 11 Exch. 190.

The judgment of the court below will therefore be reversed, and the case remanded for further proceedings in conformity with this opinion.

BRADLEY and GRAY, JJ., were not present at the argument, and took no part in the decision of this case.