Contents  
  Front Matter
  A. The Problems of Heredity and Their Solution
  B. Mendel's Experiments in Plant Hybridisation
  C. Mendel's Experiments with Hieracium
  D. A Defence of Mendel's Principles of Heredity
  E. A Defence of Mendel's Principles of Heredity (continued)
  F. A Defence of Mendel's Principles of Heredity (continued)
  G. A Defence of Mendel's Principles of Heredity (continued)
  Bibliography