By Gregor Mendel.
(_Read at the Meetings of the 8th February and 8th March, 1865._)
[23] [This translation was made by the Royal Horticultural Society,
and is reprinted with modifications and corrections, by permission.
The original paper was published in the _Verh. naturf. Ver. in Brünn,
Abhandlungen_, IV. 1865, which appeared in 1866.]