spring-tides, which had been chiselled smooth in November, on the
following May, that is, within six months afterwards, was thickly
covered with Fucus digitatus two feet, and F. esculentus six feet, in
length.
[8] With regard to Tierra del Fuego, the results are deduced from the
observations of Capt. King (Geographical Journal, 1830), and those
taken on board the Beagle. For the Falkland Islands, I am indebted to
Capt. Sulivan for the mean of the mean temperature (reduced from
careful observations at midnight, 8 A.M., noon, and 8 P.M.) of the
three hottest months, viz., December, January, and February. The
temperature of Dublin is taken from Barton.
[9] Agueros, Descrip. Hist. de la Prov. de Chiloe, 1791, p. 94.
[10] See the German Translation of this Journal; and for the other
facts, Mr. Brown's Appendix to Flinders's Voyage.
[11] On the Cordillera of central Chile, I believe the snow-line varies
exceedingly in height in different summers. I was assured that during
one very dry and long summer, all the snow disappeared from Aconcagua,
although it attains the prodigious height of 23,000 feet. It is
probable that much of the snow at these great heights is evaporated
rather than thawed.
[12] Miers's Chile, vol. i. p. 415. It is said that the sugar-cane grew
at Ingenio, lat. 32 to 33 degs., but not in sufficient quantity to make
the manufacture profitable. In the valley of Quillota, south of
Ingenio, I saw some large date palm trees.
[13] Bulkeley's and Cummin's Faithful Narrative of the Loss of the
Wager. The earthquake happened August 25, 1741.
[14] Agueros, Desc. Hist. de Chiloe, p. 227.
[15] Geological Transactions, vol. vi. p. 415.
[16] I have given details (the first, I believe, published) on this
subject in the first edition, and in the Appendix to it. I have there
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