Plant Propagation - Greenhouse and Nursery Practice #229557

To illustrate: A workman in a nursery (fig. 110) may easily transplant potted dahlia plants in a day of 10 hours without knowing anything specific of the underlying principles; whereas, the proprietor may know the principles and give proper orders for their application without being able to transplant half as many plants in the same time, yet he may be a master workman because of his knowledge of both the art and the science. The art is best acquired by following the example of a skilled workman; the science best from books and instructors.