Introductory.

I. The Mendelian Principle of Purity of Germ-Cells and the Laws of Heredity Based on Ancestry.

II. Mendel and the Critic’s Version of him.

III. The Facts in regard to Dominance of Characters in Peas.

IV. Professor Weldon’s collection of “Other Evidence concerning Dominance in Peas.”

V. Professor Weldon’s quotations from Laxton.

VI. The Argument Built on Exceptions.

VII. The question of absolute purity of germ-cells.

Conclusion.

FOOTNOTES:

Concluding Remarks.

Selection of the Experimental Plants.

Division and Arrangement of the Experiments.

The Forms of the Hybrids.31

The First Generation [Bred] from the Hybrids.

The Second Generation [Bred] from the Hybrids.

The Subsequent Generations [Bred] from the Hybrids.

The Offspring of Hybrids in which Several Differentiating Characters are Associated.

The Reproductive Cells of Hybrids.

Experiments with Hybrids of other Species of Plants.