comparison of his theory of heredity with that of Weismann, [52], [55], [73], [92], [105-106], [115], [133], [173] et seq.;
on germ and somatic-cells, [76];
on the influence of pollen upon somatic tissues, [79-80];
on graft-hybridization, [83];
on bud-variation, [95];
on the causes of variation, [102], [161];
on the inheritance of acquired characters, [107], [111-112];
on Xenia, [144];
on sexual union, [154].