Description | Describes the research completed since the third report was issued. Describes the research completed by Sir William Crookes on testing various kinds of glasses and notes that he has devised a special instrument, the Radiometer Balance, 'of great sensitiveness to heat', and has had spectacles of these glasses made up for trial runs with factory workers. Describes the physiological and pathological research on infra-red heat and Vogt's work in Germany, noting the importance of further work in this field and the committee's need for funds. p56-7. |