Abstract
Pognendorff's Annalen der Physik und Chémie, 1870, No. 9.—The contents of this number are:—(1.) “Calorimetric Researches,“by R. Bunsen. In the first part of this paper Prof. Bunsen describes the construction and method of using a new calorimeter, in which quantities of heat are measured by the amount of ice at 0° which they are capable of converting into water at the same temperature. The quantity of ice melted is in its turn indicated by the resulting diminution of volume, as shown by the movement of a mercury-column in a graduated capillary tube communicating with the vessel in which the ice is contained. In order to convert the results obtained by this method into absolute heat-units, it is necessary, either that the motion of the mercury-column produced by a known quantity of heat should be ascertained, or that the specific gravity of ice at 0° and its latent heat of fusion should be known. The first of these quantities was found by observing the effect produced by a given weight of boiling water, and the second by a process which may be described as consisting in the application of the principle of the weight-thermometer to measure the change of volume which water undergoes on freezing. From these data the third of the quantities mentioned, or the latent heat of fusion of ice, is readily calculated. Of the numerical results, given in the paper, we will quote only the following:—
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Scientific Serials . Nature 3, 258 (1871). https://doi.org/10.1038/003258a0
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DOI: https://doi.org/10.1038/003258a0