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ADDITIONAL NOTES.

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1. To be infertéd before the laff paragraph of Seët. IV. 2. 1. at FPE

line 22.

IN the prefent year 1799, Auguft 18, there was an uncommon fummer-flood on the Derwent, which covered my garden above three feet deep with muddy water. Many plants of the rheum hy- bridum, mule rhubarb, which were tranfplanted in the fpring, and had not flowered, had their large pointed leaves covered with mud, fo as to render the green colour totally invifible after the water fub- fided. They appeared ftrong as before for a day or two, and then every one withered and dropped down. The fame happened to

_the leaves of many other vegetables, and to efpallier apple-trees, as

high as they were immerfed; which was doubtlefs owins to their refpiration being precluded by the veil over them of a fine tenacious mud. See Se. VIL 2. 6.

2. To be infèrted in Se, VAL 2. 6. af p. 118, after line 20.

The rheum hybridum, mule rhubarb, defcribed in Murray’s Syf- tema Vegetabilium, edition the fourteenth, 1 believe to be produced between the palmated rhubarb, and the common rhubarb of our gar- dens, or rheum rhaphonticum; as it appeared both in my garden

4 E 2 and

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