14 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1902. [bull. 213. 
6. Mineral Resources of the United States. — From 1883 to 1804, 
inclusive, an octavo cloth-bound volume bearing the above title was 
issued annually, with only two exceptions, the years L883-S4 and 
1889-90 being included by pairs in single volumes. The first of this 
scries was Mineral Resources of the United States, 1882; the last, 
Mineral Resources of the United States, 189o. In 1894 this form of 
publication was discontinued, in accordance with an act of Congress, 
and the material was included in certain parts of the sixteenth, seven- 
teenth, eighteenth, nineteenth, twentieth, and twenty-first annual 
reports. The separate publication of the series on mineral resources 
was resumed, however, in 1901, in accordance with an act of Con- 
gress, and two volumes of the new series, Mineral Resources of the 
United States for 1900 and for 1901, have been issued. 
This publication contains a systematic statement of the production 
and value of the mineral products of the United States, a summary 
of new mineral resources developed, and occasionally short papers 
on economic geology, when necessary in accounting for the new 
developments. 
