Nature-study, as used in this handbook, encompasses all living things except humans, as well as all nonliving things such as rocks and minerals, the heavens, and weather. Of the living things described, most are common in the northeastern states, and many, such as the dandelion, milkweed, and mullein, and the house mou Memoria Press product: https://www.memoriapress.com/curriculum/science/handbook-of-nature-study/