State of the obstructions to land drainage and works of private profit redounding to the public health 302 Injuries to private property as well as to the public health, occasioned by defective administration 305 Continuance of the causes of disease in the face of representations of their effects on the population 307 Areas of jurisdiction for drainage inconsistent with efficient operations 309 Prevalent misconceptions as to the objects and state of management of existing sewerage 311 Objections made to the existing local administration of the sewers’ rate 315 Securities requisite to obviate opposition to new expenditure for sewerage 316 Necessity of the subordinate drainage of private tenements being comprehended as part of one system 319 Disturbing local interests opposed to efficient management of expenditure in new districts 322 Obstacles arising from defective local arrangements for efficient expenditure in local public works 323 Inconveniences of legislation on details, and the want of scientific and trustworthy direction 328 High rates of charges, by fees, for superintendence of imperfect structural arrangements 329 Extent of waste in expenditure on local public works, and on separate collections 333 Public facilities for private land drainage afforded by consolidation 337 Grounds of unpopularity and distrust of new local expenditure 339 _Boards of Health or public officers for the prevention of disease_:— 340 Inefficiency of Boards of Health, as ordinarily constituted 340 Failure of Boards of Health in Ireland 342 Importance of the functions of medical officers in connexion with the executive authority 343 Means and economy of skilled services for the prevention of diseases 348 Administrative measures for the prevention of disease amongst the labouring classes 349 Administrative means for promoting the extension of medical science 352