United States Navy Medical News Letter Vol. 13, No. 1, 14 January 1949A Study of Dihydrostreptomycin ...... 2 Evaluation of Dihydrostreptomycin .. 4 Dihydrostreptomycin Distribution .... 6 Dihydrostreptomycin in Tb ............ 6 New Therapy for Occluding Arteries .. 8 Anticoagulants in Heart Infarction .. 12 Nitrogen Balance ......................... 14 Lumbar Puncture Headache ........... 15 Notice re Dibenamine & Shock ....... 17 Aureomycin in Certain Diseases. ... 17 Carbon Tetrachloride Poisoning ..... 18 Testicle & Certain Irradiations ..... .. 20Urinary Barbiturate Detection . .. ... 21New Safe X-Ray Dose & Dental Techs.23Active Duty Naval Medical Officers ..... 24Re Membership in the ACP. ............. 26Training for Staff Assignments ..... 28Medical Research Adviser Appointed .... . 29Re Lamps for Nasapharyngoscope ... 29Correction in Circular Letter .. . ... .... 30NMRI Technical Director Appointed .. 30Navy's Medical Consultants Meeting.30Radioactive Isotope Use Control. . .. . ..... 31Circular Letters:Selection and Assignment of HMC's, USN to Train HC, USNR, BuMed .. . . 32Requisitioning, Receipt & Stock Levels for Medical Stores, BuMed ....... 32Navy & Marine Corps Personnel Tuberculin Testing Report, BuMed .... 33Work Project Accomplishment & Work Request Authorization, BuMed ...... 33Use of Radioactive Isotopes; Control of, BuMed ........ 34Report of Births to Fleet Hometown News Center, BuMed ........ 35Heavy Dental Equipment; Standard Color for, BuMed ..... . .. 35NavMed-Fa; Reporting of Surgical Operations on, BuMed ........ 36