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Publication Extents

Not all publications have extents, not all extents are completely accurate
Limnological studies of the major streams in Chester County, Pennsylvania
Bruce W. Lium
1977, Open-File Report 77-462
The major streams in Chester County, Pennsylvania were studied to determine their environmental state, and to relate this condition to land- use patterns. A biological numerical rating system on a scale of 1 to 10 was developed to classify stream conditions. One indicates extremely toxic conditions and 10 balanced biological...
Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: December 1977
J.B. Townshend, J.E. Papp, M.J. Moorman, C.E. Deadmon, S.P. Tilton
1977, Open-File Report 77-300-L
The preliminary geomagnetic data included here is made available to scientific personnel and organizations, as part of a cooperative effort and on a data exchange basis because of the early need by some users. To avoid delay, all of the data is copied from original forms processed at the observatory;...
Time of travel of solutes in the Tuscarawas River Basin, Ohio, August and September, 1974
Arthur O. Westfall, Earl E. Webber
1977, Open-File Report 77-23
A time-of-travel study was made on a 10.6-mile reach of the Tuscarawas River to determine average velocity and dispersion characteristics between selected points. The reach was divided into five subreaches, and a fluorescent dye used as a tracer material. At about the 50-percent flow-duration level, time-of-travel of the peak concentration...