There being no mint in California, I am informed that the laborers in the mines are compelled to dispose of their gold dust at a large discount. This appears to me to be a heavy and unjust tax upon the labor of those employed in extracting this precious metal, and I doubt not you will be disposed at the earliest period possible to relieve them from it by the establishment of a mint. In the meantime, as an assayer's office is established there, I would respectfully submit for your consideration the propriety of authorizing gold bullion which has been assayed and stamped to be received in payment of Government dues. I can not conceive that the Treasury would suffer any loss by such a provision, which will at once raise bullion to its par value, and thereby save (if I am rightly informed) many millions of dollars to the laborers which are now paid in brokerage to convert this precious metal into available funds. This discount upon their hard earnings is a heavy tax, and every effort should be made by the Government to relieve them from so great a burden. More than three-fourths of our population are engaged in the cultivation of the soil. The commercial, manufacturing, and navigating interests are all to a great extent dependent on the agricultural. It is therefore the most important interest of the nation, and has a just claim to the fostering care and protection of the Government so far as they can be extended consistently with the provisions of the Constitution. As this can not be done by the ordinary modes of legislation, I respectfully recommend the establishment of an agricultural bureau, to be charged with the duty of giving to this leading branch of American industry the encouragement which it so well deserves. In view of the immense mineral resources of our country, provision should also be made for the employment of a competent mineralogist and chemist, who should be required, under the direction of the head of the bureau, to collect specimens of the various minerals of our country and to ascertain by careful analysis their respective elements and properties and their adaptation to useful purposes. He should also be required to examine and report upon the qualities of different soils and the manures best calculated to improve their productiveness. By publishing the results of such experiments, with suitable explanations, and by the collection and distribution of rare seeds and plants, with instructions as to the best system of cultivation, much may be done to promote this great national interest.