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 The sale of the reports is conducted in accordance with the provisions of Section 10 of the Act of the 14th day of May, 1874, which directs that copies of the reports, with all maps and supplements, shall be furnished at cost of publication to all applicants for them.

All the primed volumus and maps in stock have been transferred by the Board of Commissoners to the Department of Internal Atfairs, where the sales thereof will hereafter be conducted.

Communications relating to the work of the Survey should be addressed to J. P. Leslev, State Geologist, No. 1008 Clinton street, Philadelphia, and those intended for the Board of Commissioners, to William A. Inghnm, Secretary, No. 907 Walnut street, Philadlelplhia.

All letters and orders concerning the purchase of Reports and remittances for the same, should be addressed to, J. SIMPSON AFRICA, Secretary of Internal Affairs, Harrisburg- Pa. April 1, 1884.