In each experiment two garden pots were filled with earth, and then some seeds were placed in one pot, but none in the other.

The results were as follows: No Sandy loam; seeds gathered in 1827.

In the sown pot, 31 blue : in the unsown, none.

Besides the abovcj a similar experiment was made upon the white variety from seeds of 1826, sown in bog earth.

None appeared in the unsown pot, and 9 with white flowers came up in the other.