The author, in a small book of which the bibliography fills twenty-two pages, has attempted to present certain of the chemical and metabolic changes which occur in normal pregnancy and eclampsia. The style is supposed to be terse but becomes choppy and quite often difficult to read. Little space is devoted to hemoglobin, and here the author uses percentages but does not give the standard to which the percentage refers. He also ascribes significance to changes in hemoglobin of from 6 to 10 per cent. There seems to be no definite system to the arrangement of subject matter. For example, one finds data for normal pregnancy interspersed in the chapter in which the author is presenting his views on the stabilization of eclampsia.