The President recommends that to prevent the further invasion of the United States by yellow fever it is important to discover the exact cause of the disease. He suggests that investigations to that end shall be made. The quarantine laws, he thinks, should also be amended and improved. He expresses a hope that now that the Congressional Library has been finished, and is such a magnificent building, and so perfect in its form and detail, Congress will appropriate sums sufficient to develop it, until it shall be among the richest and most useful in the world. Begging Congress to keep its expenditures within the limit of its receipts, President McKinley brought his Message to a close. G.H. ROSENFELD. INVENTION AND DISCOVERY. This is a good idea for house plants, which are such a trouble to keep properly watered. All gardeners tell you that plants never do so well in jardinieres as in the red earthen pots. It is for the reason that the common pots are porous and allow evaporation, so that the water does not become stagnant and injure the plant, while the glazed jardinieres effectually prevent it. The great objection to the red pots is that they need a saucer under them, and when moved are difficult to handle without spilling the contents of the saucer. Plants are not a bit greedy. They don't drink all the water that is given them at once; they love to let a little water run through and remain in the saucer until they need it. It is therefore necessary to the health of plants to let them stand in a vessel that will permit them to make their little reserve store if they wish to. The new invention accomplishes all of these purposes. It is a deep saucer, which gives room for an ample reservoir. Attached to it are two uprights with hinged handles at the top. These handles are to clasp the flower pot and attach it firmly to the saucer. The pot is placed in the saucer, and the uprights are bent toward the plant until they touch it. Then the spring handles are turned down and clasp the inside rim of the pot, making pot and saucer practically one piece, giving all the advantages of the jardiniere, with the health qualities of the earthen pot. * * * * * CLOTHES-PIN.--The old-fashioned clothes-pin is such a clumsy, unhandy thing, that this new invention should be hailed with delight by housekeepers. Any one who has tried to hang out washing knows the trick that clothes-pins have of standing on their heads just when they seem most firmly gripping the rope--slipping off and letting the clothes fall to the ground. The new pin will allow no such pranks. It is a double affair, and can grip the whole of a stocking or the shoulder of a garment, and hold it with absolute security.