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Lead-uranium ratio of siliceous pitchblende from Great Bear Lake, N. W. T., Canada, and its possible age
No abstract available.
Authors
J. P. Marble
Low production may not mean depletion
Five feeding tests were conducted at the Patuxent Research Refuge, Bowie, Maryland, to determine the value or dwarf and smooth sumac fruits as the sole diet of quail, as well as a supplement to other feedstuffs.....When whole sumac fruits were force-fed quail, either alone or in combination with millet seed, many of the sumac seed were defecated undigested, whereas the millet seed was digested. Li
Authors
Ralph Hile
Mineral resources of Alaska, report on progress of investigations in 1934. Mineral industry of Alaska in 1934
No abstract available.
Authors
P. S. Smith
Mineral resources of Alaska, report on progress of investigations in 1934. Upper Copper and Tanana Rivers, Alaska
No abstract available.
Authors
F. H. Moffit
Mineral resources of the region around Boulder Dam
No abstract available.
Authors
D. F. Hewett, Eugene Callaghan, B.N. Moore, T.B. Nolan, W. W. Rubey, W. T. Schaller
Mortality of fish in Lake Erie
The food habits of Blue Grouse vary from a simple winter diet that is made up predominantly of coniferous needles to a complex diet during the summer months, characterized by great variety of foods including green leaves, fruits and seeds, flowers, animal matter and coniferous needles. The spring and fall, which represent the transition periods between these two, are characterized by feeding habit
Authors
John Van Oosten
Nephelometric determination of fluorine
Fluorine in minerals may be determined with the nephelometer to about 1 per cent of the fluorine. The determination is made on an aliquot of the sodium chloride solution of the fluorine, obtained by the Berzelius method of extraction. The fluorine is precipitated as colloidal calcium fluoride in alcoholic solution, gelatin serving as a protective colloid. Arsenates, sulfates, and phosphates, which
Authors
R. E. Stevens
Net selectivity on the Great Lakes
Two experiments, using 784 bobwhite quail chicks, were conducted at the Patuxent Research Refuge, Bowie, Maryland, to find a growing diet that would meet wartime restrictions. In 1941 a diet containing 14 per cent sardine fish meal was formulated and gave satisfactory results from the standpoints of survival and growth. Since fish meal now is scarce, search was made for a diet without war-restrict
Authors
John Van Oosten