X-Ray and Electro-Therapeutics. Three Catalogues. Includes X-Rays and High Frequency- Practical Hints to Beginners, pub. London: Harry W. Cox Ltd., no date, c.1920. 113pp. of equipment, x-ray samples and explanatory text. Electro-Medical Instruments and their Management, pub. London: Schall & Son. 1914. 356pp. with thumb index. Comprehensive range of equipment and instructions. X-Ray and Therapeutic Specialties (Supplementary List), pub. London: Harry W. Cox Ltd., no date c.1920. 30pp. in binder covers. Mostly equipment with descriptive text. No text on procedure. All catalogues in poor to fair condition due to their covers. Generally the contents are clean and straight except for Schall's thumb index which has insect depredation. (250x157mm) (average)