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Page 7106, results 177626 - 177650

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Not all publications have extents, not all extents are completely accurate
Correlation list of new and old numbers of The Descriptive Catalogue of the Photographs of the U.S. Geological Survey of the Territories for the Years 1869-1875: Miscellaneous Publication, no. 5, Department of the Interior, U.S. Geological Survey of the Territories, 1875
1951, Report
The numbers of the negatives listed in the Descriptive Catalogue of the Photographs of the U. S. Geological Survey of the Territories for the years 1869 to 1875, Miscellaneous Publication No. 5, Department of the Interior, U. S. Geological Survey of the Territories, 1875, were replaced many years ago with...
Tissue levels of various sulfonamides in trout
S. F. Snieszko, S. B. Friddle
1951, Transactions of the American Fisheries Society (80) 240-250
Studies were made on the tissue levels of sulfonamides in trout. The tissue concentrations of sulfamerazine were determined in brook trout given various doses of this drug. It has been found also that there exists a relationship between the rate of feeding, depending on the size of trout, and the...
Conservation: Where we stand: Review of Water, land, and people
Luna Bergere Leopold
1951, The Living Wilderness (36)
A distinguished conservationist, just returned from more than a year in those Pacific islands held in trust by the United States, reports that representatives of the government there are nearly completely concerned with the maintenance of an administrative organization. Actual advances in matters of land use, of maintaining the material...
Rainfall frequency: An aspect of climatic variation
Luna Bergere Leopold
1951, Eos, Transactions, American Geophysical Union (32) 347-357
Analyses which have been made in the past have shown no significant trend in annual values of rainfall during the period of rainfall records in the southwestern United States. In the present study, frequency of daily rains of various sizes are analyzed for four long-record stations in New Mexico. It...
Determination of fluorine in organic compounds: Microcombustion method
H. S. Clark
1951, Analytical Chemistry (23) 659-661
A reliable and widely applicable means of determining fluorine in organic compounds has long been needed. Increased interest in this field of research in recent years has intensified the need. Fluorine in organic combinations may be determined by combustion at 900° C. in a quartz tube with a platinum catalyst,...
Geochemical field method for determination of nickel in plants
L.E. Reichen
1951, Analytical Chemistry (23) 727-729
The use of biogeochemical data in prospecting for nickel emphasizes the need for a simple, moderately accurate field method for the determination of nickel in plants. In order to follow leads provided by plants of unusual nickel content without loss of time, the plants should be analyzed and the results...
Fluorometric determination of zirconium in minerals
W.C. Alford, L. Shapiro, C. E. White
1951, Analytical Chemistry (23) 1149-1152
The increasing use of zirconium in alloys and in the ceramics industry has created renewed interest in methods for its determination. It is a common constituent of many minerals, but is usually present in very small amounts. Published methods tend to be tedious, time-consuming, and uncertain as to accuracy. A...
Aromatic fluorine compounds. IV. 1,2,3,5-Tetrafluorobenzene
G. C. Finger, F.H. Reed, R.E. Oesterling
1951, Journal of the American Chemical Society (73) 152-153
The preparation of 1,2,3,5-tetrafluorobenzene and some of its intermediates is described. Cuprous oxide as a catalyst was used to advantage in the hypophosphorous acid deamination method....
Cooperative investigation of precision and accuracy in chemical analysis of silicate rocks
W.G. Schlecht
1951, Analytical Chemistry (23) 1568-1571
This is the preliminary report of the first extensive program ever organized to study the analysis of igneous rocks, a study sponsored by the United States Geological Survey, the Massachusetts Institute of Technology, and the Geophysical Laboratory of the Carnegie Institution of Washington. Large samples of two typical igneous rocks,...