Blackwood's Edinburgh Magazine, No. 401, March 1849. Various

spread and known for so many ages, the home or native country of our cereal plants is not only unknown, but some suppose the several species, like the varieties of the human race, to have all sprung from a common stock.

      "It is a very remarkable circumstance, as observed by Dr Lindley, that the native country of wheat, oats, barley, and rye should be entirely unknown; for although oats and barley were found by Colonel Chesney, apparently wild, on the banks of the Euphrates, it is doubtful whether they were not the remains of cultivation. This has led to an opinion, on the part of some persons, that all our cereal plants are artificial productions, obtained accidentally, but retaining their habits, which have become fixed in the course of ages."

      Whatever may be the original source of our known species of grain, and of their numerous varieties, it cannot be doubted that their existence, at the present time, is a great blessing to man. Of wheat there are upwards of a hundred and fifty known varieties, of barley upwards of thirty, and of oats about sixty. While the different species – wheat, barley, and oats – are each specially confined to large but limited regions of the earth's surface, the different varieties adapt themselves to the varied conditions of soil and climate which exist within the natural geographical region of each, and to the different uses for which each species is intended to be employed.

      Thus the influence of variety upon the adaptation of the oat to the soil, climate, and wants of a given locality, is shown by the following observations: —

      "The Siberian oat is cultivated in the poorer soils and higher districts, resists the force of the wind, and yields a grain well adapted for the support of farm-horses. The straw is fine and pliable, and makes an excellent dry fodder for cattle and horses, the saccharine matter in the joints being very sensible to the taste. It comes early to maturity, and hence its name."

      The Tartarian oat, from the peculiarity of its form, and from its "possessing a beard, is of such a hardy nature as to thrive in soils and climates where the other grains cannot be raised. It is much cultivated in England, and not at all in Scotland. It is a coarse grain, more fit for horse-food than to make into meal. The grain is dark coloured and awny; the straw coarse, harsh, brittle, and rather short."

      The reader will see from this extract that the English "food for horses" is, in reality, not the same thing as the "chief o' Scotia's food;" and that a little agricultural knowledge would have prevented Dr Johnson from exhibiting, in the same sentence, an example of both his ignorance and his venom.

      Variety affects appearance and quality; and how these are to be consulted in reference to the market in which the grain is to be sold, may be gathered from the following: —

      "When wheat is quite opaque, indicating not the least translucency, it is in the best state for yielding the finest flour – such flour as confectioners use for pastry; and in this state it will be eagerly purchased by them at a large price. Wheat in this state contains the largest proportion of fecula or starch, and is therefore best suited to the starch-maker, as well as the confectioner. On the other hand, when wheat is translucent, hard, and flinty, it is better suited to the common baker than the confectioner and starch manufacturer, as affording what is called strong flour, that rises boldly with yeast into a spongy dough. Bakers will, therefore, give more for good wheat in this state than in the opaque; but for bread of finest quality the flour should be fine as well as strong, and therefore a mixture of the two conditions of wheat is best suited for making the best quality of bread. Bakers, when they purchase their own wheat, are in the habit of mixing wheat which respectively possesses those qualities; and millers who are in the habit of supplying bakers with flour, mix different kinds of wheat, and grind them together for their use. Some sorts of wheat naturally possess both these properties, and on that account are great favourites with bakers, though not so with confectioners; and, I presume, to this mixed property is to be ascribed the great and lasting popularity which Hunter's white wheat has so long enjoyed. We hear also of 'high mixed' Danzig wheat, which has been so mixed for the purpose, and is in high repute amongst bakers. Generally speaking, the purest coloured white wheat indicates most opacity, and, of course, yields the finest flour; and red wheat is most flinty, and therefore yields the strongest flour: a translucent red wheat will yield stronger flour than a translucent white wheat, and yet a red wheat never realises so high a price in the market as white – partly because it contains a larger proportion of refuse in the grinding, but chiefly because it yields less fine flour, that is, starch."

      In regard to wheat, it has been supposed, that the qualities referred to in the above extract, as especially fitting certain varieties for the use of the confectioner, &c., were owing to the existence of a larger quantity of gluten in these kinds of grain. Chemical inquiry has, however, nearly dissipated that idea, and with it certain erroneous opinions, previously entertained, as to their superior nutritive value. Climate and physiological constitution induce differences in our vegetable productions, which chemical research may detect and explain, but may never be able to remove or entirely control.

      The bran, or external covering of the grain of wheat, has recently also been the subject of scientific and economical investigation. It has been proved, by the researches of Johnston, confirmed by those of Miller and others, that the bran of wheat, though less readily digestible, contains more nutritive matter than the white interior of the grain. Brown, or household bread, therefore, which contains a portion of the bran, is to be preferred, both for economy and for nutritive quality, to that made of the finest flour.

      Upon the economy of mixing potato with wheaten flour, and of home-made bread, Mr Stephens has the following: —

      "It is assumed by some people, that a mixture of potatoes amongst wheaten flour renders bread lighter and more wholesome. That it will make bread whiter, I have no doubt; but I have as little doubt that it will render it more insipid, and it is demonstrable that it makes it dearer than wheaten flour. Thus, take a bushel of 'seconds' flour, weighing 56 lbs. at 5s. 6d. A batch of bread, to consist of 21 lbs., will absorb as much water, and require as much yeast and salt, as will yield 7 loaves, of 4 lbs. each, for 2s. 4d., or 4d. per loaf. 'If, instead of 7 lbs. of the flour, the same weight of raw potatoes be substituted, with the hope of saving by the comparatively low price of the latter article, the quantity of bread that will be yielded will be but a trifle more than would have been produced from 14 lbs. of flour only, without the addition of the 7 lbs. of potatoes; for the starch of this root is the only nutritive part, and we have proved that but one-seventh or one-eighth of it is contained in every pound, the remainder being water and innutritive matter. Only 20 lbs. of bread, therefore, instead of 28 lbs., will be obtained; and this, though white, will be comparatively flavourless, and liable to become dry and sour in a few days; whereas, without the latter addition, bread made in private families will keep well for 3 weeks, though, after a fortnight, it begins to deteriorate, especially in the autumn.' The calculation of comparative cost is thus shown: —

      The yield, 20 lbs., or 5 loaves of 4 lbs. each, will be nearly 5d. each, which is dearer than the wheaten loaves at 4d. each, and the bread, besides, of inferior quality.

      "'There are persons who assert – for we have heard them – that there is no economy in baking at home. An accurate and constant attention to the matter, with a close calculation of every week's results for several years – a calculation induced by the sheer love of investigation and experiment – enables us to assure our readers, that a gain is invariably made of from 1½d. to 2d. on the 4 lb. loaf. If all be intrusted to servants, we do not pretend to deny that the waste may neutralise the profit; but, with care and investigation, we pledge our veracity that the saving will prove to be considerable.' These are the observations of a lady well known to me."

      In the natural history of barley the most remarkable fact is, the high northern latitudes in which it can be successfully cultivated. Not only does it ripen in the Orkney and Shetland and Faroe Islands, but on the shores of the White Sea; and near the North Cape, in north latitude 70°, it thrives and yields nourishment to the inhabitants. In Iceland, in latitude 63° to 66° north, it ceases to ripen, not because the temperature is too low, but because rains fall at an unseasonable time, and thus prevent the filling ear from arriving at maturity.

      The oat is distinguished