Sc. and north. Forms: α. 5 soym(e, 5 somme, 6 so(l)me, 8 soam. β. 57 sowme, 6 soume, sovme, 8 sowm. [prob. a. OF. some, somme, soume, saume (med.L. sauma, sagma: see SEAM sb.2) pack-saddle, horse-load; but the difference in the sense is not accounted for by the existing evidence.]
1. A rope or chain, attaching a draught-horse or other animal to a wagon, plow, etc.; a trace-rope. Also attrib. in soam-chain.
α. 1375. Barbour, Bruce, X. 180. Hastyly He suld stryk with the ax in twa The hede-soyme. Ibid., 233. He hewit in twa the soym in hy.
c. 1459. Reg. Aberbrothoc (Bann. Cl.), II. 108. Owr bailye straik the sommys in twa and hewyt the plwche.
1535. Stewart, Cron. Scot., I. 171. Thair wapynis [they] maid thame all in somes to thair pleuche.
1582. Wills & Inv. N. C. (Surtees, 1860), 46. ij plewes with socke and culter, viij draught yokes, viij somes.
1765. A. Dickson, Treat. Agric. (ed. 2), 255. The soam of the pair immediately before the hindmost must be fixed to the beam.
1799. J. Robertson, Agric. Perth, 103. That inconvenience is prevented in the plough by using a long chain (provincially a soam).
1844. H. Stephens, Book of Farm, I. 626. The leading horses are thus yoked by a second set of common swing-trees to the end of the soam. Ibid. The middle horse pulling by the soam-chain.
β. 1404. Durh. Acc. Rolls (Surtees), 398. ij cultris, iij plogherbandis, viij sowmes.
1451. Durh. Depos. (Surtees), 30. iij crokes, j sowme.
1513. Acc. Ld. High Treas. Scot., IV. 513. For xx stane of towis to be soumes for the gunnys.
1572. Wills & Inv. N. C. (Surtees, 1835), 350. ix sowmes, iiij plewes, iij cowters.
1662. in Pitcairn, Crim. Trials, III. 603. Paddokis did draw the plewgh, as oxen; qwickens wer sowmes.
1752. Rec. Elgin (New Spalding Cl.), I. 465. Sowms, thramels, rigwoodies, and all other work of straw, bent or rushes.
2. Coal-mining. (See quots.)
1789. Brand, Hist. Newcastle, II. 681. In low seams, [the coals are drawn] on trams, pulled by two small cords, called soams, by a boy.
1851. Greenwell, Coal-Trade Terms Northumb. & Durh., 30. A little boy, who performs his part by pulling the tub by a couple of ropes or traces called soams.
1883. Gresley, Gloss. Coal-mining, 229. Soams. A pair of cords about three feet in length, by which foals and half marrows pull tubs along the roads.