REPORT OF COMMITTEE D-13 ON TEXTILE MATERIALS. Committee D-13 on Textile Materials held two meetings during the past year. Through the courtesy of the Providence Engineering Society both of these meetings were held in that Society's rooms in Providence, the first on October 28 and 29, 1921, and the second on March 3 and 4, 1922. Both meetings were well attended by members and there was a large attendance of guests representing various cotton manufacturing organizations. At the fall meeting, the time was principally taken up in discussion of preliminary reports from the sub-committees. These discussions resulted in recommendations to sub-committees for continuation of the work and complete reports were submitted at the spring meeting. A great deal of constructive criticism has resulted from the publication in 1921 of the Tentative Specifications for Imperfections and Tolerances for 60-in. 17-oz. Square-Woven Tire Builder Fabric (D 122-21 T)1 and this matter has been the subject of considerable discussion both by Sub-Committee VI on Imperfections and Tolerances, and by Committee D-13. Important revisions have been made in this tentative standard, and in the revised form in which it is herewith submitted to the Society, under the title "Tentative Specifications for Imperfections and Tolerances for 60-in. 174-oz. (made of yarn not less than 8 ply) Square-Woven Builder Fabric," to replace the present Tentative Specifications, it was unanimously approved by all members present at the March meeting of Committee D-13. The standardization of methods for determination of crimp and off square, particularly the expression of results of these tests, is of great importance to manufacturers and consumers of tire fabric. At present there are two methods in use from which the values obtained are at considerable variance with each other. In answer to a questionnaire submitted to the tire fabric and tire industries by a special sub-committee appointed to study this matter, a large majority replied that the method at present recommended by Committee D-13 is being used. This committee therefore recommends that the Tenta 1 Proceedings, Am. Soc. Test. Mats., Vol. 21, p. 811 (1921). ? See p. 967.-Ed. tive Methods of Testing Textiles (D 76-20 T)1 be published for the year 1922 with no other change than the addition to Section 6 of a note describing "Take-up" to read as follows: "NOTE.-'Crimp' shall not be confused with 'take-up' which is the percentage difference between the yarn length after straightening and the yarn length as it lies in the fabric based on the straightened yarn length. The threads for the 'take-up' test shall be straightened with the same machine used for the 'crimp' test, but for this test it shall be equipped with an extra scale on the dial, in which case the scale shall be plainly marked 'crimp' and 'take-up'." A great deal of interest was shown by both members and guests in a new principle for a machine for testing fabric with a constant rate of load application described in a paper read at the October meeting by Henry L. Scott. At this meeting Prof. Haven presented a discussion on the mathematics involved in this machine. At the March meeting Mr. Scott exhibited a working machine built on this principle which was constructed at the request of Committee D-13. Committee D-13 recommends that the following revisions be made in the Tentative Definitions of Terms Relating to Mechanical Fabric (D 123-21 T).2 Change the title from its present form: namely, "Tentative Definitions of Terms Relating to Mechanical Fabric." to read as follows: "Tentative Definitions of Terms Relating to Textile Materials." Add a new central heading to read as follows: "(4) Mechanical Fabric." Section 3.-Change the definition of oil belt duck from its present form: namely, "Oil Belt Duck.-A closely woven fabric of plied yarns not over No. 8, made in a variety of widths, the weight being based on the square yard.” to read as follows: "Oil Belt Duck.-A closely woven fabric of plied yarns not over No. 8, made in a variety of widths, usually a 32-oz. fabric, the weight being based on the square yard." Change the definition of numbered duck from its present form: namely, “Numbered Duck.—A plain woven fabric of plied yarns ranging from coarse to fine numbers, weight being based on 22-in. width one yard long." 1 Proceedings, Am. Soc. Test. Mats., Vol. XX, Part I, p. 804 (1920). 1 Proceedings, Am. Soc. Test. Mats., Vol. 21, p. 814 (1921). to read as follows: "Numbered Duck.-A plain woven fabric of plied yarns ranging from coarse to fine numbers, weight being based on 22-in. width." Change the definition of army duck from its present form: namely, " 'Army Duck.-A fabric made in closely woven plied yarns, weight being based on 28-in. width.” to read as follows: "Army Duck.-A closely woven fabric of plied yarns usually ranging between 7 to 12 oz., the weight being based on 284-in. width." Add a new Section 4 including six new definitions under the new central heading "(B) Cotton Fabrics Other than Mechanical Fabrics," to read as follows: "4. Twill.-A weave which produces pronounced lines running diagonally across the fabric, some of which are known as follows: (a) Drills-A commercial term for a fabric with warp face twill usually made with three harnesses and single yarns. (b) Alberts. A commercial term for a fabric with filling face usually made with four or five harnesses. (c) Jeans. A commercial term for a fabric with warp face twill like a drill but with higher count and finer yarns. (d) Serge.-A commercial term for a fabric of twill weave made with four harnesses 2 by 2. (e) Clay.-A commercial term for a fabric similar to a serge but made with six harnesses 3 by 3." Partly because of the great variety of products produced by textile manufacturers and partly because of lack of appreciation of the advantages which could be obtained through the use of test methods common to the seller and buyer there has been and still is a very noticeable lack of standardization on the part of textile manufacturers in the testing of their products. Obviously the benefit to be derived from a set of standard test methods by manufacturers and consumers depends upon the extent to which they are used, and Committee D-13 has been constantly faced with the problem of making the use of its test methods more general. During the past year considerable work has been done to acquaint textile manufacturers with the Society's standards, and recommendations have been made to the Executive Committee of the Society regarding the endorsement of the Standard General Methods for Testing Cotton Fabrics (D 3920 T) by textile associations. To fill the need for the development of standards relating to hose and belt ducks, a new sub-committee has been appointed which includes representatives of several of the largest manufacturers and consumers of these fabrics. During the past year twelve new members have been enrolled in Committee D-13. Committee D-13 submits to the Society one new standard, the Tentative Methods of Testing Cotton Fibers, appended hereto,1 for publication as tentative, and three revisions of present tentative standards. These have been submitted to letter ballot of the committee consisting of fifty-one members, with the following results: Revision of the Tentative Specifications for Imperfections and Tolerances for 60-in. 21 T). 41 0 10 This report has been submitted to letter ballot of the committee, which consists of fifty-one members, of whom 40 have voted affirmatively, none negatively, and 11 have refrained from voting. Respectfully submitted on behalf of the committee, G. W. SKIRM. Secretary. A. E. JURY, Chairman, EDITORIAL NOTE. The proposed revisions of the Tentative Specifications for Imperfections and Tolerances for 60-in. 17-oz. Square-Woven Tire Builder Fabric, of the Tentative Methods of Testing Textiles and of the Tentative Definitions of Terms Relating to Textile Materials were accepted. The tentative standards as thus revised appear on pages 967, 971, and 976, respectively. The proposed Tentative Methods of Testing Cotton Fibers were accepted for publication as tentative and appear on page 973. 1 See p. 973.-ED. REPORT OF COMMITTEE E-1 ON METHODS OF TESTING. In its annual report a year ago, Committee E-1 on Methods of Testing reviewed briefly the history of the preparation of methods of testing in the Society and outlined the conditions which led to its reorganization by the Executive Committee through the formation of an Advisory Committee of seven "members-at-large" and the representation of all standing committees through the appointment of one or two "representative members." The general plan of conducting the committee's work, as provided in the Regulations Governing Methods and Instruments of Testing drawn up jointly by the Executive Committee and Committee E-5 on Standing Committees, was outlined in some detail. Since the last annual meeting the Advisory Committee has held three meetings: October 12, 1921, November 18, 1921, and February 17, 1922. The meeting of the main committee scheduled for November was cancelled, and a regular meeting was held February 17, 1922. The Advisory Committee and the main committee will meet again during the present annual meeting. The Executive Committee has appointed W. H. Fulweiler as a member of the Advisory Committee to succeed A. V. Bleininger, resigned. The Regulations Governing Methods and Instruments of Testing and also the Rules Governing Committee E-1 on Methods of Testing (the latter prepared and adopted by the committee to govern the details of its procedure) will be printed in the current Year Book. At the suggestion of the Executive Committee, Committee E-1 brought to the attention of each standing committee during the year the importance of devoting careful attention to the development of methods of testing, pointing out that this is one of the primary objects of the Society. It is gratifying to note that the preparation of methods of test by the standing committees during the year has been quite stimulated and that there will be presented at this annual meeting a number of new methods or extensive revisions of existing methods in several important fields of the Society's work. |