The harvest, now approaching, everywhere gives promise of a bounteous supply of the productions which annually bless our favored land. The vast invading army of the enemy, soon to be driven with disaster out of the loyal States, will have made no serious impression upon the abundance of our overflowing stores. There may be some scarcity of labor to secure the maturing crops, but we shall still supply all our own wants abundantly, leaving a large surplus for shipment abroad, and even for meeting the necessities of our suffering brethren in the South, when they shall have utterly failed in their wicked purpose of destroying the Government, and when their sharp cry of hunger and suffering shall appeal to our relenting hearts for succor. THE EARTH AND THE AIR. The great bulk of all vegetation is derived from the atmosphere. The air is always loaded with watery vapor, and it contains a vast quantity of carbonic acid gas, which furnishes the chief material for the woody fibre of all plants, for the starch, sugar, gums, oils, and other valuable compounds produced by them. Nitrogen, also, is one of the large constituents of the air, and is found in it likewise in the form of ammonia. It is wonderful to reflect that of all the vegetable productions of the earth--its vast forests, the flowery clothing of its boundless prairies, the immeasurable productions raised by the industry of the whole human race in its countless fields of labor--that of all this mighty growth which covers and adorns the face of the whole solid globe, more than ninety-five hundredths are derived exclusively from the atmosphere. This vast ocean which surrounds the earth, in which we are immersed, and which is actually the breath of life to us, indispensable to our existence during every moment of our lives, is also the great reservoir from which the mighty vegetable world draws almost the whole of its substance. While we are inspiring the invisible fluid, and with every breath renewing the ruddy currents of the heart and sending them glowing with warmth and vitality to all the extremities of the frame, every leaf in the mighty forest, and every herb, and flower, and blade of grass on the surface of the whole earth, is maintaining a similar commerce with the air, drawing from its boundless stores of carbon, piling up cell upon cell and adding fibre to fibre, until trunk, and branch, and stem, and leaf, with all the gorgeous productions of vegetable life, stand forth in their maturity, filling the bosom of the conscious atmosphere with wonderful creations of beauty and fruits of joy.