With respect to the inhalation of woolly matter, Mr. Leigh, a surgeon at Manchester, and Registrar of Deaths for the Deans-gate sub-district of that city, in which cotton-mills are so numerous, states, in one of his Reports to the Registrar-General, that in certain trades in Manchester almost every member above 40 is affected with emphysema of the lungs; and that persons who work in dust—as fustian-cutters, cotton-carders, and the like—are almost all affected with it, after working at their occupations for a few years.