THE IMPORTANCE OF THE COMPARISON BETWEEN THE CONTENT (STONE AND BILE)AND THE CONTAINER, TO ESTABLISH WHETHER, IN PATIENTS WITH GALLSTONES,THE INCREASE OF PRONUCLEATING SUBSTANCES IS ALREADY PRESENT IN THE HEPATIC BILE OR IS, AT LEAST IN PART, THE RESULT OF THE INJURIOUS EFFECTOF SOME BILE COMPOUNDS ON THE GALLBLADDER MUCOSA