Holinshed tells us that in 1493 wheat was sold in London at 6d. the bushel; and in 1557.—‘This yeare, before harvest wheat was sold for foure marks the quarter, malt at foure and fortie shillings the quarter, and pease at six and fortie shillings and eight pence; but, after harvest, wheat was sold for five shillings the quarter, malt at six shillings eight pence, rie at three shillings foure pence. So that the penie wheat loafe that weied in London the last yeere but eleven ounces Troie weied now six and fiftie ounces Troie. In the countrie wheat was sold for foure shillings the quarter, malt at foure shillings eight pence; and, in some places a bushell of rie for a pound of candles, which were foure pence.’ CHAPTER VIII. HOW GRAIN BECOMES FLOUR. In order to make bread, the first operation is to grind the corn, be it wheat, rye, barley, or oats, and we have already seen the rough methods used by primitive man and others to effect this; we have noted the mealing stones, the pestle and mortar, the hand quern, and the grinding of corn by the Greeks and Romans. They soon gave up man as a motive power, and substituted mules or horses; these in their time gave place to water, which is a cheap and, if there be anything like a fall, a very powerful motor—hence the mills dotted all over the country, by the side of brook or river, with their water-wheels either over or undershot Very picturesque are they mostly, and the drowsy murmur of the wheel and the gentle splashing of the water are very pleasant We are seeing the last of them; they have done their work and must be thrown aside, for no one in his senses, who had water-power, would now erect water-wheels when he could get a turbine. As with the water-wheel, so its congener, the windmill, beloved of artists, is going. A motive power as cheap as water is the wind, but, unfortunately, it is not so reliable. It is believed that the Chinese were the first to use the wind as a motive power for mills, and we have no record as to when they were introduced into Europe; we only know they were in use in the twelfth century. As a rule, in England, windmills have four arms, or ‘whips,’ but sometimes they have six. These arms are generally covered with strong canvas, but occasionally they are covered with thin boarding; they are set at an angle, which varies according to the fancy of the miller, but the shaft to which they are attached (called the ‘wind shaft’) is invariably placed at an inclination of 10 or 15 degrees, in order that the revolving arms should clear the bottom portion of the mill. [Illustration: A POST MILL.] [Illustration: A WATER-WHEEL MILL.]