This illustration is taken from the -eport of the Metropolitan Sewage Commission. The representation as though seen through a microscope is decidedly effective

place. The figures for the bacteria count are given with the chart so that all the data are available to anyone who may wish to study the facts from a scientific standpoint.

The drawing of Fig. 17 is of the cartoon type, effective for wall exhibitions or for use in the more popular magazines. This particular

SIMPLE COMPARISONS

Fig. 17.

The Independent

Five Forms of Our National Waste

A cartoon type of chart like this will reach a popular audience. Accuracy of statement should not, however, be sacrificed as it has been here, in that there is no way of correctly comparing the money bags

diagram contains nothing by which accurate comparison may be made.

No figures are given, and it is impossible to tell whether the different

money bags should be compared on the basis of diameter, area, or volume. x\lmost the only conclusion which can be drawn from such a diagram is one regarding the relative rank of the different expenditures. The reliability of even that is likely to be questioned because of the evident lack of accuracy in this kind of chart. Nevertheless the cartoonist style should not be broadly condemned, for it has tremendous possibilities. It is possible to combine the cartoonist's wonderful power of arousing interest with methods of presenting facts which will give a numerical interpretation that cannot be

misunderstood. There is a great opportunity waiting for the man who can