ADVERTISEMENT. 
It is deemed proper on the appearance of this, the first published 
Monograph of the United States Geological Survey, to call attention to 
the statute, approved March 3, 1879, which declares that — 
The pxiblications of tlie Geological Survey sliall consist of the annual report of operations, 
geological and economic maps illustrating the resources and classification of the lands, and reports 
upon general and economic geology and paleontology. The annual report of operations of the 
Geological Survey shall accompany the annual report of the Secretary of the Interior. All special 
memoirs and reports of said Survey shall he issued in uniform quarto series if deemed necessary by the 
Director, hut otherwise in ordinary octavos. Three thousand copies of each shall he published for 
scientific exchanges and for sale at the price of publication; and all literary and cartographic 
materials received in exchange shall he the property of the United States and form a part of the 
Uhrary of the organization: And the money resulting from the sale of such publications shall he 
covered into the Treasury of the United States. 
From this it will be seen that only the annual reports, which form 
parts of the reports of the Secretary of the Interior and are printed as 
executive documents, are available for gratuitous distribution. While a 
number of them are furnished the Survey for its exchange list, the bulk of 
them are supplied directly, through the document-rooms of Congress, to 
members of the Senate and House. Except, therefore, in those cases in 
which an extra number is supplied to this ofSce by special resolution, 
application must be made to members of Congress for the annual report, 
as for all other executive documents. 
The Monographs of the Survey are printed for the Survey alone, and 
can be distributed by it only through a fair exchange for books needed in 
its library, or through the sale of those copies over and above the number 
needed for such exchange. They are not for gratuitous distribution. 
The first of these Monographs in numeric order is: The Precious 
Metals of the United States, by Clarence King. This will appear 
dining the coming year. The second in numeric order but the first in 
order of publication is the present work: The Tertiary History of the 
Grand Canon District, by Capt. C. E. Dutton. 
The price of this volume, with atlas, is $ 
Correspondence relating to this and all other Monographs of the 
Survey, and all remittances, should be addressed to the 
Director of the United States Geological Survey, 
Washington, D. C. 
