Letter from Molly Brazier to William Grey Walter, 7 January 1944

Orders a frequency analyser for the E.E.G. Laboratory of Massachusetts General Hospital. Discusses her work on frequency measurement and suggests this has revealed a correlation between the grading of normal E.E.G. readings and the success of cadets in pilot training. Also notes changes in E.E.G. pattern due to bloog sugar level and in psycho-neurotics. Promises to extend research into the effects of amytal adrenalin and mecholyl. Reports her use of the Grass Ink writing oscillograph and cathode ray oscillograph in the production of myograms for the investigation of infantile paralysis.