Understand that I am not a teacher of this Science--I stand very low in the class of learners. I began to learn too late in life, and have been too incessantly harassed by a multiplicity of cares, to make any satisfactory progress. Any tolerably educated boy of fifteen may know far more of Agricultural Science by the time he has passed his eighteenth birthday than I do. What I know in this respect can help him very little; my faith that there is much to be known, and that he may master it if he will, is all that is of much importance. If I can convince a considerable number of our youth that they may surely acquire a competence by the time they shall have passed their fortieth year, without excessive labor or penurious frugality, by means of that knowledge of principles and laws subservient to Agriculture which their fathers could not, but which they easily may attain, I shall have rendered a substantial service alike to them and to our country. XL. FARM IMPLEMENTS. A good workman, it is said, does not quarrel with his tools--which, if true, I judge is due to the fact that he generally manages to have good ones. To work hard throughout a long day under a burning sun, is sufficiently trying, without rendering the labor doubly repugnant by the use of ill-contrived, imperfect, inefficient implements. The half-century which nearly bounds my recollection has witnessed great improvements in this respect. The Plow, mainly of wood, wherewith my father broke up his stony, hide-bound acres of New-Hampshire pebbles and gravel, in my early boyhood, would now be spurned if offered as a gift to the poorest and most thriftless farmer among us; and the Hoes which were allotted to us boys in those days, after the newer and better had been assigned to the men, would be rejected with disdain by the stupidest negro in Virginia. Though there is still room for improvement, we use far better implements than our grandfathers did, with a corresponding increase in the efficiency of our labor; but the cultivators of Spain, Portugal, and the greater part of Europe, still linger in the dark ages in this respect. Their plows are little better than the forked sticks which served their barbarian ancestors, and their implements generally are beneath contempt. With such implements, deep and thorough culture is simply impossible, unless by the use of the spade; and he must be a hard worker who produces a peck of Wheat or half a bushel of Indian Corn per day by the exclusive use of this tool. The soil of France is so cut up and subdivided into little strips of two or three roods up to as many acres each--each strip forming the entire patrimony of a family--that agricultural advancement or efficiency is, with the great mass of French cultivators, out of the question. Hence, I judge that, outside of Great Britain and Australia, there is no country wherein an average year's work produces half so much grain as in our