It receives the sewage of several of the largest cities of India.

The term sewage many years ago was rightly applied to the excremental refuse of towns, but it is a most difficult matter to define the liquid that teems into our rivers under the name of sewage to-day; in most towns "chemical refuse" is the best name for the complex fluid running from the sewers.

All the while a scientific disquisition on ammonia and the constituent parts and probable value of town sewage as compared with guano.

The houses being built on arched subways, great convenience exists for conveying sewage from, and for conducting water and gas into, the different domiciles.

A glance at the countryside conjures up a picture of extensive tracts being cultivated on a wholesale scale, of skilled men directing great ploughing, sowing, and reaping plants, steering cattle and sheep about carefully designed enclosures, constructing channels and guiding sewage towards its proper destination on the fields, and then of added crowds of genial people coming out to spray trees and plants, pick and sort and pack fruits.