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The sources of our iron ores. II
In this instalment** the iron ore deposits of the Lake Superior States, which normally furnish about 80 per cent, of the annual output of the United States, are described together with historical notes on discovery and transportation of ore. Deposits in the Mississippi Valley and Western States are likewise outlined and the sources of imported ore are given. Reviewing the whole field, it is indica
Authors
E. F. Burchard
The Suslota Pass district, upper Copper River region, Alaska
No abstract available.
Authors
F. H. Moffit
On glaciers
The changes in the sizes of glaciers has for long attracted the attention of glacialists on account of the scientific interest and the development of water‐power from the streams issuing from the glaciers.The International Congress of Geologists, at its Zurich meeting in 1894, appointed a committee, with members from many countries, to collect and publish information bearing on this subject. Annua
Authors
F. E. Matthes
Investigations of the fluctuations of the ground‐water table in Pennsylvania
Hydraulic engineers are interested in ground‐water as a source of water supply and also as it affects stream‐flow. The stream‐flow is especially valuable at low stages and it is at the low stages that it is most closely related to the ground‐water conditions. For several years the Pennsylvania Topographic and Geologic Survey and the United States Geological Survey have cooperated in making a compr
Authors
S.W. Lohman
Recent investigations of Thiem's method for determining permeability of water‐bearing materials
This paper presents results obtained in an investigation of the ground-water resources of the Platte River Valley that is being conducted in cooperation between the Conservation and Survey Department of the University of Nebraska and the United States Geological Survey.Most quantitative ground-water studies are concerned with the amount of water that percolates into the discharge-area of an invest
Authors
L.K. Wenzel