The last cited instance of the practical operation of measures for the abatement of the nuisances attendant on common lodging-houses may also be submitted as an instance of the advantages derivable from the extension of such fields of inquiries as the present. On each of the chief points included in it there would have been a loss of what I hope will be deemed valuable corroborative information, had the inquiry been confined either to England or to Scotland. The observation of the important productive use of the refuse of the city of Edinburgh would have been of comparatively little value as evidence leading to practical applications, apart from the observation of what is accomplished by the practical application of science to sewerage and drainage for the immediate and cheapest removal of all the refuse of towns by water through closed drains afforded by the operation in the Holborn and Finsbury division of the metropolis. It may be stated confidently that, if the inquiry could conveniently have had still further extension as to time and place, the information would have been strengthened and rendered more complete. From incidental facts I have met with, I am led to believe that the whole of the effects which are the subject of the present report would have been still more strikingly displayed in many parts of Ireland.