ABSTRACT
Life is a rhythm: work and play alternate, and exertion and relaxation succeed each other affording an invigorating variety. This invests with great importance the question how to make a wise use of one's leisure. It is easy to perceive that a recreation should be such as gives us pleasure, a profitable pleasure if possible, and at the same time imparts to us re-enforced vigour and energy that send us back to work with a relish and appetite for activity. Tastes differ, and there is a wide field for individual choice of recreations. Prominent in the list of hobbies is that of collecting, which is at worst a harmless occupation for one's leisure hours.
