The purport of this paper was to place on record certain observations made during the years 1843–4–5, in the southern hemisphere, at those times of the year when the Zodiacal Light cannot be seen in the Northern hemisphere; to test, by means of these new data,—which, besides the novelty of the geographical position, had the further one of being determined by instrumental measurement,—what laws of the phenomena may be considered to have been satisfactorily made out, and what required further elucidation; and to recommend these latter to the attention of observers situated in more favourable parts of the world than those commanded by European Observatories generally.