Professional and Industrial History of Suffolk County: Constitutional history of Boston, by C. W. Ernst. Medical profession of Suffolk County, by E. J. Forster. Street railway system of Boston, by P. Cummings. Wholesale shoe trade of Suffolk County, 1629-1892, by F. W. Norcross. Hide and leather trade of Suffolk County, by F. W. Norcross. Industrial history of Suffolk County. Boston's relation to the textile industry. The Massachusetts charitable mechanic association. Biographies