Ontario. Department of Education, Ontario Teachers' Manuals: Household Management
“ Lesson II COMPOSITION OF ANY PART OF A PLANTFrom the foregoing, the pupils may infer that there are eight different foods to study. They should be led to see that in reality there is only one, as all parts of plants are, generally speaking, the same in structure. Referring to the animal body, they will know that a bone from the foot is of much the same structure as one from the face; that a piece of flesh from the leg is the same as a piece from any other part of the body. In the same way, if we study one part of a plant, it will be a type of all parts. ”
