SECTION 4. Before any inventor or discoverer shall receive a patent for his invention or discovery he shall apply therefor in writing to the Minister of Interior, and shall file in the office of the Interior Department a written description of the same and of the manner and process of making, compounding and using it, in clear, concise and exact terms and in case of a machine he shall explain the principle thereof and of the manner in which he has applied that principle so as to distinguish it from other inventions, and he shall particularly point out and distinctly claim the part, improvement or combination which he claims as his invention or discovery. When the nature of the case admits of drawings the applicant shall furnish them as set forth in Section 2. When the invention or discovery is of a composition of matter, the applicant shall furnish a specimen of ingredients and of the composition, sufficient in quantity for the purpose of experiment. In all cases which admit of representation by model, the applicant shall, if required, furnish a model of convenient size to exhibit advantageously the several parts of his invention. SECTION 5. The applicant shall make oath that he believes himself to be the original and first inventor or discoverer of the art, machine, manufacture, composition or improvement for which he solicits a patent, and that, he does not know or believe that the same was ever before known or used, and shall state of what country he is a citizen. SECTION 6. On filing of any such application and the payment of the fees required by law, the Commissioner of Patents shall examine the alleged new invention or discovery, and if upon such examination it shall appear that the claimant is justly entitled to a patent under the law and that the same is sufficiently useful and important, he shall report accordingly to the Minister of Interior, who shall cause a patent to be issued therefor. SECTION 7. Any person who makes any new invention or discovery, and desires further time to mature the same, may on payment of the fees required by law, file in the Interior Department a _caveat_ setting forth the design thereof and its distinguishing characteristics, and praying protection of his right until he shall have matured the invention. Such _caveat_ shall be preserved in secrecy and shall be operative for the term of one year from the filing thereof. SECTION 8. The Commissioner of Patents shall be appointed by the Minister of Interior and shall examine and report on all applications for patents and shall receive for such services a fee of twenty dollars for each application examined and reported by him, which fee shall be paid by the applicant in advance. In addition to this fee the following fees shall be charged all applicants for patents, upon filing each original application for a patent, five dollars; and upon issuing a patent, five dollars; and five dollars shall be charged for the filing of a _caveat_.