J. H. Craven, A text-book on hygiene and pediatrics from a chiropractic standpoint (1924)
“ The pulse may be made to beat faster, the thoughts turned from the serious things of life to the less serious, and the mind made to desire the activities of the pleasurable things of worldly enjoyment by the peculiar environment and the intensity of the illumination. Or the mind may be soothed into the tranquil moods and the entire being made to surge with emotion, while the mind is directed from the more frivolous subjects to the deepest thoughts of the philosopher with a proper arranging of the surroundings and a soothing and delicate lighting over all. ”
