SMITH, L. D., M.D How to Use High Frequency Violet Ray: Direction for Treatment Chicago: Lindstrom & Company, 1929. 8vo. Wraps. Unpaginated. Some pencilling on rear cover, light cover wear & soiling; else very good.  Price: $25.00 Add to Cart Ask a Question See all items in Medicine See all items by L. D. SMITH, M. D.