Abstract
Zeilschrift der Oesterreichischen Gesellschaft für Meteorologie, August 15.—This number contains a description, with diagrams, of Theorell's printing meteorograph, a very ingenious instrument, likely to be of much service in meteorology. It differs from other meteorographs in this, that instead of tracing curves, which have to be afterwards translated into figures, it prints the figures at once, thus saving much future trouble. One of the three already made has been in use at the Royal Observatory of Vienna since September 1874, and has been so adapted as to record, by electric communication, the state of the following instruments, placed in any situation: anemometer, vane, wet and dry thermometers, and barometer, once in every quarter of an hour. The moving force is a galvanic current connected with a clock. Dr. Theorell's account of the instrument referring to the plates will be continued in the next number of the Zeitschrift. In the “Kleinere Mittheilungen” Prof. Hoffmann, of Giessen, compares the sum of the daily maxima of solar radiation in several years with the time of the flowering of certain plants. His results in 1875 bear out his expectations derived from four previous years' observations, 1866–69, and in certain cases his forecast of the time of flowering was nearly correct.—There is besides a paper by Dr. Schreiber on a new registering air thermometer; also a letter from Mr. Ferrel on the theory of storms.
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Scientific Serials . Nature 12, 488 (1875). https://doi.org/10.1038/012488a0
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DOI: https://doi.org/10.1038/012488a0