Page "Darwin from Insectivorous Plants to Worms" Paragraph 30

With Variation at the printers and with his old essay on The Movements and Habits of Climbing Plants due out in November 1875 with " illustrations ... drawn by my son, George ", Darwin wrote The Effects of Cross and Self Fertilisation in the Vegetable Kingdom.

This drew on a painstaking series of experiments, protecting the plants from insects and controlling the pollination of flowers, counting the seeds and checking them for fertility, repeated for up to ten generations with detailed records kept at every stage.