Abstract
Rivista Scientifico-Industrials, February.—The total solar eclipse of August 19, 1887, by Prof. Cacciatore. Prof. Tacchini having at the last eclipse established the presence round the sun of delicate white protuberances different from the ordinary rose-coloured protuberances daily visible under the spectroscope, it is announced that the Minister of Public Instruction will send Prof. Tacchini and Prof. Riccò to observe the August eclipse in Siberia for the express purpose of studying these new manifestations.—On the origin of the variations of intensity in the dry pile, and on the means of preventing them, by Prof. Luigi almieri. The author's experiments lead to the conclusion that the dry pile is not only the most durable, but also the most constant, and that the variations of intensity are due to dispersions. These dispersions are independent of the moisture and temperature of the surrounding atmosphere, at least within certain limits, while the pile enveloped in a volume of air will preserve its force almost unaltered for years, and not only not diminished, but even slightly increased, by the atmospheric moisture.
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Scientific Serials . Nature 36, 45 (1887). https://doi.org/10.1038/036045a0
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DOI: https://doi.org/10.1038/036045a0