Abstract
THE Journal Ila of July 17—an aëronautical journal published at Frankfort—contains an article which in some respects is supplementary to that on the subject of position finding without an horizon which appeared in NATURE of July 22, or, as this article was the later in time, perhaps it would be more correct to say that it was supplementary to the one in Ila. The latter, which is written by Dr. Alfred Brill, relates to the reduction of observed altitudes for the purpose of finding position by means which can be quickly and readily effected in a balloon. After showing the inconvenience of the usual trigonometrical methods used on board ship, and how tire-some the use of tables must be which correlate time, latitude, declination, and altitude, he proceeds to describe his method, which is one eminently suitable and convenient, that is, where a graphic method is sufficiently accurate.
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B., C. Position Finding Without an Horizon . Nature 81, 231–232 (1909). https://doi.org/10.1038/081231b0
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DOI: https://doi.org/10.1038/081231b0