Observations on the climate of Penzance and the district of the Land's End in Cornwall : with an appendix containing meteorological tables, and a catalogue of the rarer indigenous plants. Read before the Penwith Agricultural Society, and published by request of the members / By John Forbes.

  • Forbes, John, Sir, 1787-1861.
Date:
1821
Catalogue details

Licence: Public Domain Mark

Credit: Observations on the climate of Penzance and the district of the Land's End in Cornwall : with an appendix containing meteorological tables, and a catalogue of the rarer indigenous plants. Read before the Penwith Agricultural Society, and published by request of the members / By John Forbes. Source: Wellcome Collection.

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    manner of observing, or in the period, that could account for a proportion so much exceeding that recorded in my Table. But in order that a more accurate judgment may be formed of the comparative fall of rain in this part of the island, I have col¬ lected, from various sources, recent accounts of the fail of rain in numerous places in this country, as near as possible to the period included in the Pen¬ zance and Calenick Tables.* From this it appears that the fall of rain in the west of Cornwall as stated in Table II., viz. 25 inches, is in fact considerably below the standard of the island. In the Table, I have given the mean monthly fall of rain at Calenick for six years, and at Penzance for two; and I shall consider the mean of both these as the nearest ap¬ proximation to the truth yet attainableit is this I use in the following observations. With regard to the relative dryness of the dif¬ ferent parts of the year,f it appears that the five months from October to February inclusive are the wettest, as well in the number of rainy days as in the actual fall of rain. Considered in respect of the number of rainy days only, it appears that the above- mentioned five months differ very little; that No¬ vember is the wettest month; November and De¬ cember the two wettest consecutive months; June is the driest; March and April the two driest con¬ secutive months, and next to these and nearly equally dry, are June and July. * See Table VI, t See Table III,