Читать книгу Farm drainage - Henry F. French - Страница 8

Draining as Old as the Deluge.—Roman Authors.—Walter Bligh in 1650.—No thorough drainage till Smith of Deanston.—No mention of tiles in the "Compleat Body of Husbandry," 1758.—Tiles found 100 years old.—Elkington's System.—Johnstone's Puns and Peripatetics.—Draining Springs.—Bletonism, or the Faculty of Perceiving Subterranean Water.—Deanston System.—Views of Mr. Parkes.—Keythorpe System.—Wharncliffe System.—Introduction of tiles into America.—John Johnston, and Mr. Delafield, of New York.

The art of removing superfluous water from land, must be as ancient as the art of cultivation; and from the time when Noah and his family anxiously watched the subsiding of the waters into their appropriate channels, to the present, men must have felt the ill effects of too much water, and adopted means more or less effective, to remove it.

The Roman writers upon agriculture, Cato, Columella, and Pliny, all mention draining, and some of them give minute directions for forming drains with stones, branches of trees, and straw. Palladius, in his De Aquæ Ductibus, mentions earthen-ware tubes, used however for aqueducts, rather for conveying water from place to place, than for draining lands for agriculture.

Nothing, however, like the systematic drainage of the present day, seems to have been conceived of in England, until about 1650, when Captain Walter Bligh published a work, which is interesting, as embodying and boldly advocating the theory of deep-drainage as applied by him to water-meadows and swamps, and as applicable to the drainage of all other moist lands.

We give from the 7th volume of the Journal of the Royal Agricultural Society, in the language of that eminent advocate of deep-drainage, Josiah Parkes, an account of this rare book, and of the principles which it advocates, as a fitting introduction to the more modern and more perfect system of thorough drainage:

"The author of this work was a Captain Walter Bligh, signing himself, 'A Lover of Ingenuity.' It is quaintly entitled, 'The English Improver Improved; or, the Survey of Husbandry Surveyed;' with several prefaces, but specially addressed to 'The Right Honorable the Lord General Cromwell, and the Right Honorable the Lord President, and the rest of the Honorable Society of the Council of State.' In his instructions for forming the flooding and draining trenches of water-meadows, the author says of the latter:—'And for thy drayning-trench, it must be made so deep, that it goe to the bottom of the cold spewing moyst water, that feeds the flagg and the rush; for the widenesse of it, use thine own liberty, but be sure to make it so wide as thou mayest goe to the bottom of it, which must be so low as any moysture lyeth, which moysture usually lyeth under the over and second swarth of the earth, in some gravel or sand, or else, where some greater stones are mixt with clay, under which thou must goe half one spade's graft deep at least. Yea, suppose this corruption that feeds and nourisheth the rush or flagg, should lie a yard or four-foot deepe; to the bottom of it thou must goe, if ever thou wilt drayn it to purpose, or make the utmost advantage of either floating or drayning, without which the water cannot have its kindly operation; for though the water fatten naturally, yet still this coldnesse and moysture lies gnawing within, and not being taken clean away, it eates out what the water fattens; and so the goodnesse of the water is, as it were, riddled, screened, and strained out into the land, leaving the richnesse and the leanesse sliding away from it.' In another place, he replies to the objectors of floating, that it will breed the rush, the flagg, and mare-blab; 'only make thy drayning-trenches deep enough, and not too far off thy floating course, and I'le warrant it they drayn away that under-moysture, fylth, and venom as aforesaid, that maintains them; and then believe me, or deny Scripture, which I hope thou doust not, as Bildad said unto Job, "Can the rush grow without mire, or the flagg without water?" Job viii. 12. That interrogation plainly showes that the rush cannot grow, the water being taken from the root; for it is not the moystnesse upon the surface of the land, for then every shower should increase the rush, but it is that which lieth at the root, which, drayned away at the bottom, leaves it naked and barren of relief.'

"The author frequently returns to this charge, explaining over and over again the necessity of removing what we call bottom-water, and which he well designates as 'filth and venom.'

"In the course of my operations as a drainer, I have met with, or heard of, so many instances of swamp-drainage, executed precisely according to the plans of this author, and sometimes in a superior manner—the conduits being formed of walling stone, at a period long antecedent to the memory of the living—that I am disposed to consider the practice of deep drainage to have originated with Captain Bligh, and to have been preserved by imitators in various parts of the country; since a book, which passed through three editions in the time of the Commonwealth, must necessarily have had an extensive circulation, and enjoyed a high renown. Several complimentary autograph verses, written by some imitators and admirers of the ingenious Bligh, are bound up with the volume. I find also, not unfrequently, very ancient deep drains in arable fields, and some of them still in good condition; and in a case or two, I have met with several ancient drains six feet deep, placed parallel with each other, but at so great a distance asunder, as not to have commanded a perfect drainage of the intermediate space. The author from whom I have so largely quoted, is the earliest known to me, who has had the sagacity to distinguish between the transient effect of rain, and the constant action of stagnant bottom-water in maintaining land in a wet condition."

Dr. Shier, editor of "Davy's Agricultural Chemistry," says, "The history of drainage in Britain may be briefly told. Till the time of Smith, of Deanston, draining was generally regarded as the means of freeing the land from springs, oozes, and under-water, and it was applied only to lands palpably wet, and producing rushes and other aquatic plants."

He then proceeds to give the principles of Elkington, Smith, Parkes, and other modern writers, of which we shall speak more at large.

The work published in England, not far from Captain Bligh's time, under the title "A Complete Body of Husbandry," undertakes to give directions for all sorts of farming processes. A Second Edition, in four octavo volumes, of which we have a copy, was published in 1758. It professes to treat of "Draining in General," and then of the draining of boggy land and of fens, but gives no intimation that any other lands require drainage.

Directions are given for filling drains with "rough stones," to be covered with refuse wood, and over that, some of the earth that was thrown out in digging. "By this means," says the writer, "a passage will be left free for all the water the springs yield, and there will be none of these great openings upon the surface."

He thus describes a method practiced in Oxfordshire of draining with bushes:

"Let the trenches be cut deeper than otherwise, suppose three foot deep, and two foot over. As soon as they are made, let the bottoms of them be covered with fresh-cut blackthorn bushes. Upon these, throw in a quantity of large refuse stones; over these let there be another covering of straw, and upon this, some of the earth, so as to make the surface level with the rest. These trenches will always keep open."

No mention whatever is made in this elaborate treatise of tiles of any kind, which affords very strong evidence that they were not in use for drainage at that time. In a note, however, to Stephen's "Draining and Irrigation," we find the following statement and opinion:

"In draining the park at Grimsthorpe, Lincolnshire, about three years ago, some drains, made with tiles, were found eight feet below the surface of the ground. The tiles were similar to what are now used, and in as good a state of preservation as when first laid, although they must have remained there above one hundred years."