Benzene Vapour Detector apparatus
Benzene Vapour Detector apparatus, using the `Formolite' method, from the Occupational Health Department of the London School of Hygiene and Tropical Medicine, by Siebe Gorman and Co. Ltd, England, 1958-1970
Benzene Vapour Detector apparatus, using the `Formolite' method, contained in wooden box, from the Occupational Health Department of the London School of Hygiene and Tropical Medicine, by Siebe Gorman and Co. Ltd, England, 1958-1970
Benzene Vapour Detector apparatus, using the `Formolite' method, from the Occupational Health Department of the London School of Hygiene and Tropical Medicine, by Siebe Gorman and Co. Ltd, England, 1958-1970
Wooden box for Benzene Vapour Detector apparatus, using the `Formolite' method, from the Occupational Health Department of the London School of Hygiene and Tropical Medicine, by Siebe Gorman and Co. Ltd, England, 1958-1970