considerable fortune in addition to the amount received for their work. In 1822 Calhoun, then Secretary of War, admitted in a conversation with Whitney that the Government was saving $25,000 a year at the public armories alone by his improvements, and it should be remembered that the utility of Whitney's labors during this part of his life was not limited to this particular business. In 1812 Whitney made application to Congress for the renewal of his patent for the cotton-gin. In his memorial he presented the history of the struggles he had been forced to make in defence of his rights, observing that he had been unable to obtain any decision on the merits of his claim until thirteen years of his patent had expired. He states also that his invention had been a source of opulence to thousands of the citizens of the United States; that as a labor-saving machine it would enable one man to perform the work of a thousand men, and that it furnished to the whole family of mankind, at a very cheap rate, the most essential material for their clothing. Although so great advantages had already been experienced, and the prospect of future benefits was so promising, still, many of those whose interest had been most promoted and the value of whose property had been most enhanced by this invention, had obstinately persisted in refusing to make any compensation to the inventor. From the State in which he had first made, and where, he had first introduced his machine, and which had derived the most signal benefits--Georgia--he had received nothing; and from no State had he received the amount of half a cent per pound on the cotton cleaned with his machines in one year. Estimating the value of the labor of one man at twenty cents a day, the whole amount which had been received by him for his invention was not equal to the value of the labor saved in one hour by his machines then in use in the United States. He continues: "It is objected that if the patentee succeeds in procuring the renewal of his patent he will be too rich. There is no probability that the patentee, if the term of his patent were extended for twenty years, would ever obtain for his invention one-half as much as many an individual will gain by the use of it. Up to the present time the whole amount of what he had acquired from this source, after deducting his expenses, does not exceed one-half the sum which a single individual has gained by the use of the machine in one year. It is true that considerable sums have been obtained from some of the States where the machine is used, but no small portion of these sums has been expended in prosecuting his claim in a State where nothing has been obtained, and where his machine has been used to the greatest advantage."