Much has been written in the last two years on the Abderhalden test. The workers in this field may be divided into three groups:
Those who support Abderhalden's contentions entirely and believe that a diagnosis of pregnancy, carcinoma and various other conditions can be absolutely made by exposing the serum from a case to the specific substrate against which these ferments are mobilized by the body.
Those who believe that the method is of no possible value in diagnosing pregnancy or any other condition.
Those who believe that, while the ferment content of the blood is undoubtedly increased in pregnancy and various other conditions, the specificity of the ferments as maintained by Abderhalden and his supporters is not proved as yet; and in the light of the most recent work is highly improbable.
To the individual not engaged in the work, the many papers appearing, some of which contain contradictory