Note 39 — THE SCOTTISH HARVEST.

"Not that I think there was more rain in the earlier part of summer than the potato crop could absorb, for it is known to require a large supply of moisture in its growing state, in order to acquire a full development of all its parts. It was observable, however, that the rain increased as the season advanced, and after the potato plant had reached its full development. It is, therefore, probable that the increased moisture, which was not then wanted by the plant, would become excessive; and this moisture, along with the low temperature, may have produced such chemical change in the sap as to facilitate the putrefaction of the entire plant. As to the theories with respect to the presence of a fungus, or of insects, in the plant, I consider these as a mere exponent of the tendency to a state of putrefaction; such being the usual accompaniments of all vegetable and animal decay."