Jacob T. Child, The Pearl of Asia — Chapter 31 Siamese Ploughs… (1892)
“ A native plough is not worthy of the name. They are of two kinds, one designed to be drawn by a single buffalo, and the other by a yoke of oxen. The difference between them is mainly in the length of the beam. The plough for a single buffalo has a beam only about four feet long; but the beam for a yoke of oxen is from 10 to 12 feet in length, proceeding forward from the handle with an upward curve, then downward, and then again upward to a slender and graceful point which is seen above the heads of the oxen, and 18 or 20 inches ahead of them. ”
