He established light-and air-baths over half a century ago at Trieste and elsewhere in Austria.

His motto was: "Light, Truth, and Freedom are the motive forces towards the highest development of physical and moral health." Man is not a fish, he declared; light and air are the first conditions of a highly organized life.

Solaria for the treatment of a number of different disordered conditions are now commonly established, and most systems of natural therapeutics attach prime importance to light and air, while in medicine generally it is beginning to be recognized that such influences can by no means be neglected.

Dr.Fernand Sandoz, in his _Introduction a la Therapeutique Naturiste par les agents Physiques et Dietetiques_ (1907) sets forth such methods comprehensively.

In Germany sun-baths have become widely common; thus Lenkei (in a paper summarized in _British Medical Journal_, Oct.