"is a culture of the twentieth century possessing its own philosophical, ethical and scientific frame which is distinct from those of agriculture, and other producer . In the latter, conservation is directed towards the creation and maintenance of the quality and quantity of the product, be it cereal, wood pulp or automobiles; in the former, nature conservation is directed towards the maintenance of numbers of different species distributed in different assemblages of natural or semi-natural type and towards the care of geological and physiographical features."