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These are, I think, all the references I have met with to the prismatic structure of subterranean ice. But there is an interesting account in Poggendorff 's Annalen, by a private teacher in Jena, of the crystalline appearance of ice under slow thaw near that town.
This theory is still further supported by the resistance on the negative electrodes noticed by Hittorf, which almost explains Erdman's experiments, because if negative electricity enters a flame with greater difficulty, then positive electricity must leave a flame with difficulty. W. Holtz, in Wiedemanris Beiblaetter to Poggendorfs Annalen.
The results were described in a paper 'On the Radiation of Electricity, which, in 1859, he posted to Professor Poggendorff; for insertion in the well-known periodical, the ANNALEN DER PHYSIK. The memoir was declined, to the great disappointment of the sensitive young teacher.
Siemens had been trained as a mechanical engineer, and, although he became an eminent electrician in later life, his most important work at this early stage was non-electrical; indeed, the greatest achievement of his life was non-electrical, for we must regard the regenerative furnace as his MAGNUM OPUS. Though in 1847 he published a paper in Liebig's ANNALEN DER CHEMIE on the 'Mercaptan of Selenium, his mind was busy with the new ideas upon the nature of heat which were promulgated by Carnot, Clayperon, Joule, Clausius, Mayer, Thomson, and Rankine.
It is related that, after his lecture on the telephone at Geissen, in 1854, Professor Poggendorff, who was present, invited him to send a description of his instrument to the ANNALEN. Reis answered him,'Ich danke Ihnen recht Sehr, Herr Professor; es ist zu spaty. Jetzt will ICH nicht ihn schickeny. I shall not send it now.
There is an interesting account in Poggendorff's Annalen of a visit made by Professor A. Pleischl to a mountain in the circle of Leitmeritz, where ice is found in summer under very curious circumstances. The mountain is called Pleschiwetz, and lies above Kameik, in Bohemia, not far from the town of Leitmeritz.
Siemens and Halske at Berlin seems likely to be the parent of many others. One of the most recent is the underground electric line laid down by the firm in the mines of Zankerodain Saxony. An account of this railway has appeared in Glaser's Annalen, together with drawings of the engine, which we are able to reproduce.
These and numerous other results bearing upon the question were published at the time in the 'Philosophical Magazine' and in 'Poggendorff's Annalen'; and the investigation of diamagnetism and magne-crystallic action was subsequently continued by me in the laboratory of Professor Magnus of Berlin. In December, 1851, after I had quitted Germany, Dr.
Julius Robert Mayer, practising physician in the little German town of Heilbronn, published a paper in Liebig's Annalen on "The Forces of Inorganic Nature," in which not merely the mechanical theory of heat, but the entire doctrine of the conservation of energy, is explicitly if briefly stated. Two years earlier Dr.
Could the veil be withdrawn, some indications as to the originating temperature of the solar spectrum might be gathered from its range, since the proportion of quick vibrations given out by a glowing body grows with the intensity of its incandescence. Nach., No. 3,053, Amer. Roy. Roy. Annalen, Bd. cxlvi., p. 475; Astr. British Astr. Kön. Böhm Ges. d. Astr. Roy. Roy. Roy. Soc., vol. xxiv., p. 353.
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