[To THZ EDITOR or THE " SPECTATOR."' you permit me
to sound a note of warning to farmers who may be tempted to give effect to the suggestion contained in the letter from your correspondent, Mr. J. H.
Kerner-Greenwood? There is something poetical and attrao live in the idea that ponds may be maintained by dew, but, as you allowed me to point out in your columns on a formet occasion, there is no evidence whatever to support such belief. The so-called dew-ponds are merely rain-water receptacles, and they are maintained in normal seasons because the evapor- ation from them is less than the rainfall upon them and upon the area of ground draining to them. In a year of deficient rainfall, such as that we have just passed through, this area must be considerable in order to conserve any water for use during the summer and autumn months.—I am, Sir, &c.,
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