The Formation of Vegetable Mould Through the Action of Worms

The Formation of Vegetable Mould Through the Action of Worms, with Observations on their Habits (sometimes shortened to Worms) is an 1881 book by Charles Darwin on earthworms. It was his last scientific book, and was published shortly before his death (see Darwin from Insectivorous Plants to Worms).

Source: Wikipedia — The Formation of Vegetable Mould Through the Action of Worms (CC BY-SA 4.0)