Kidney-stone surgery affords an admirable opportunity for good team work. In my clinic the cystoscopic work and the catheterization of the ureters is in charge of Dr. H. L. Kretschmer and the x-ray work is in charge of Dr. H. E. Potter, to whom belongs much of the credit of this contribution. I am thoroughly convinced that in this difficult field of surgery the best results can be obtained only by such a division of labor.
In 1897 I used the x-ray for the first time in this country in the successful diagnosis of kidney-stone. Since that time I have operated in more than 70 cases of kidney-stone, using in practically all the x-ray to confirm the diagnosis. I desire to present very briefly some of my conclusions gained by this clinical experience.
The etiology of renal calculus is not as yet fully determined.