Abstract
American Journal of Science, May.—On the relationship of the Pleistocene to the pre-Pleistocene formations of the Mississippi basin, south of the limit of glaciation, by T. C. Chamberlain and R. D. Salisbury.—On certain measures of the intensity of solar radiation, by William Ferrel. The author shows that many measures of the intensity of solar radiation are of uncertain value. He specially discusses M. Crova's curves of the relative intensities of solar radiation, obtained at Montpellier with a modified form of the thermopile, called the registering actinometer.—Geological age of the Saganaga syenite, by Horace V. Winchell.—On a self-feeding Sprengel pump, by H. L. Wells. —Contributions to mineralogy, No. 50, by F. A. Genth; with crystallographic notes by S. L. Penfield and L. V. Pirsson. The composition and habits of the following minerals are given: three new varieties of axinite, eudialyte, and monticellite, and titanite from Magnet Cove, Arkansas.—
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Scientific Serials. Nature 44, 91–92 (1891). https://doi.org/10.1038/044091c0
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DOI: https://doi.org/10.1038/044091c0