Abstract
I SEE in NATURE, vol. xxv, p. 385, an interesting letter from a German physicist, who comments on the recital of my last balloon ascent (January 25, 1882) as published in your columns. I am very grateful for the numerous instances of frost-rime that he quotes as having been observed on former occasions, but I cannot possibly admit his theory of the liquidity of minute waterdrops suspended in the air at a low temperature. The reason why I object to this view was explained more than a century ago by the celebrated Bouguer, when describing in 1744, to the French Academy of Sciences the coronæ he observed in the Andes on the occasion of his ascending the Pichincha. I beg leave to quote this interesting account of a quite forgotten exploration:—
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DE FONVIELLE, W. Rime Cloud observed in a Balloon. Nature 25, 436 (1882). https://doi.org/10.1038/025436d0
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DOI: https://doi.org/10.1038/025436d0
