This book has splendid possibilities which do not seem to be fully realized. The anatomic chapter does not seem sufficiently clear for the understanding of a layman; perhaps one reason is that there is a great deal of rather technical discussion of histology.
The author promulgates the theory of autointoxication as one of the causes of tooth disease, attributing autointoxication to "an accumulation of an excess of waste products which are normally thrown off through the stool, perspiration, respiration and urine." Needless to say, this theory of disease has been largely discredited. Under the same heading he mentions x-rays, light, electricity, atmospheric pressure, heat and cold. This may perhaps be merely poor organization of material, but to the lay reader it is likely to give an erroneous impression. His reference to certain hereditary conditions among other causes of disease of the teeth will lead the layman, whose ideas of heredity