Original (inglés)

INDEX LIST OF PLATES PLATE I. Recessive Pile Fowls PLATE II. Abnormal Specimen Of Turbot PLATE III. Flounder, Showing Pigmentation Of Lower Side After Exposure To Light INTRODUCTION Historical Survey Of Theories Or Suggestions Of Chemical Influence In Heredity Weismann, strongly as he denied the possibility of the transmission of somatic modifications, admitted the possibility or even the fact of the simultaneous modification of soma and germ by external conditions such as temperatu