This little volume is deserving of some credit because of the apparent sincerity of its author. On reading it, however, one is impressed with the fact that it is too complex and involved to be of great value to the lay mind and insufficient technically to be of value to the scientific mind; it falls somewhere midway between the two groups.
The author has a rather strained attitude toward certain types of food and is rather prejudiced with reference to the cause or causes of abrasion. He probably will find few people who will agree that the tooth brush will cause an abrasion.
In his article on pyorrhea he seems to be convinced that it is purely of local origin. On the contrary, it is probably true that pyorrhea is as much a constitutional disease as nephritis. Conditions resembling those in pyorrhea may be brought about by the accumulation of