Numerous applications have been and no doubt will continue to be made for grants of land in aid of the construction of railways.  It is not believed to be within the intent and meaning of the Constitution that the power to dispose of the public domain should be used otherwise than might be expected from a prudent proprietor and therefore that grants of land to aid in the construction of roads should be restricted to cases where it would be for the interest of a proprietor under like circumstances thus to contribute to the construction of these works.  For the practical operation of such grants thus far in advancing the interests of the States in which the works are located, and at the same time the substantial interests of all the other States, by enhancing the value and promoting the rapid sale of the public domain, I refer you to the report of the Secretary of the Interior.  A careful examination, however, will show that this experience is the result of a just discrimination and will be far from affording encouragement to a reckless or indiscriminate extension of the principle.

I commend to your favorable consideration the men of genius of our country who by their inventions and discoveries in science and arts have contributed largely to the improvements of the age without, in many instances, securing for themselves anything like an adequate reward.  For many interesting details upon this subject I refer you to the appropriate reports, and especially urge upon your early attention the apparently slight, but really important, modifications of existing laws therein suggested.

The liberal spirit which has so long marked the action of Congress in relation to the District of Columbia will, I have no doubt, continue to be manifested.

The erection of an asylum for the insane of the District of Columbia and of the Army and Navy of the United States has been somewhat retarded by the great demand for materials and labor during the past summer, but full preparation for the reception of patients before the return of another winter is anticipated; and there is the best reason to believe, from the plan and contemplated arrangements which have been devised, with the large experience furnished within the last few years in relation to the nature and treatment of the disease, that it will prove an asylum indeed to this most helpless and afflicted class of sufferers and stand as a noble monument of wisdom and mercy.  Under the acts of Congress of August 31, 1852, and of March 3, 1853, designed to secure for the cities of Washington and Georgetown an abundant supply of good and wholesome water, it became my duty to examine the report and plans of the engineer who had charge of the surveys under the act first named.  The best, if not the only, plan calculated to secure permanently the object sought was that which contemplates taking the water from the Great Falls of the Potomac, and consequently I gave to it my approval.