Gilson , John Cary , 1912-1989 , expert in occupational health and pulmonary diseases

John Cary Gilson was a leading figure in the study of occupational lung diseases. During the Second World War, he was employed at the RAF Physiology Laboratory (later known as the Institute of Aviation Medicine), Farnborough. He helped to develop improved oxygen equipment for pilots and, by inventing a simple spring-loaded tape measure (measurements could be taken at the same tension so that they matched each other), he mastered the problem of measuring pilots to their uniforms. In 1946, Gilson joined the Medical Research Council's (MRC) Pneumoconiosis Research Unit (PRU) as deputy to Charles Fletcher. The unit had been established in Cardiff in 1945 to examine coal workers' pneumoconiosis: it discovered that pneumoconiosis was preventable if dust levels were monitored, and coal workers x-rayed regularly. It also ascertained that the disease was not disabling until a second complicating condition began to affect the lungs. A simple breathing test was designed to measure the degree of disability caused. Gilson himself was responsible for equipping a mobile x-ray van for use in the field. He was an expert in film reading and worked with the International Labour Office (ILO) to standardise the classification of radiographs of pneumonconioses. During the 1950s the Unit also began to study the effects of asbestos and of organic dusts such as those produced by cotton, flax and hemp, which cause occupational diseases such as byssinosis.