Internists distinguish the following principal forms of renal diseases: acute nephritis and chronic nephritis. Of the latter there are two grand divisions, the parenchymatous, with its three forms, large white kidney, large redkidney and the secondary contracted kidney; and the chronic interstitial or primary contracted kidney, which is accompanied by cardiac hypertrophy and general arteriosclerosis. The accoucheur, in addition to these, must consider the kidney of pregnancy, its aggravated form, the so-called pregnancy nephritis, and the kidney changes which are a part of eclampsia. Since even the internists are not in perfect accord regarding the classification of their physical findings, and admit that the various recognized varieties of disease may be associated or co-related, it is not to be expected that clinically the accoucheur will be able to identify absolutely the many conditions presented for treatment.
Primary acute nephritis may develop during gestation from the same causes which operate outside