This paper consists of three very instructive lectures about certain problems in art and is distinguished by the clarity and precision with which it treats these complicated matters. Kris says, 'Every individual work of art is deeply rooted in the economic, social, and psychic circumstances of the time of its creation. It is equally determined by the amazing and mysterious human being who has been its creator. The research of both sides of its origin is the field which has to be investigated.' Kris limits himself more or less to the psychological field.

The first lecture concerns the 'æsthetic illusion', namely the specific attitude on which the enjoyment of art is based. This attitude differs from that which confuses the world of art with the world of reality, a disturbance of the function of reality-testing which occurs in many forms. One who delights in art, though deeply touched by it, must know that what he experiences is not fully based on