Important to the technical industries is the chapter on the disposal of canning factory wastes.

As a result of this investigation of cannery waste it has been possible to illustrate that by the use of broad irrigation beds, that is, distributing the waste over superficial areas, the waste of the canning factory can be effectually disposed of. It is of course evident that for such disposition the soil must be suitable, that is, sandy and pervious to water, and of a contour suitable to the creation of large beds in which the level of the sewage will not greatly vary from place to place, in connection to settling basins by which the greater part of the solid matter may be removed. This method of disposal of the waste may be safely considered as insuring the purity of the running streams, which up to this time have been practically the sole recipients of sewage waste.