The present series of the Harvey Society Lectures is fully up to the usual standard, consisting as it does of reviews on anatomy, histology, physiology, biochemistry and physicochemistry, mathematics, and medical history by authorities representing more or less equally American and European schools.
F. R. Nager of Zürich, the first otologist to deliver a Harvey Lecture, emphasizes the importance of histologic work in diseases of the ear, especially those of the middle ear, in regard to tuberculosis, malignancy, cholesteatoma, otosclerosis and experimental noise-deafness. In the last, air conduction is to blame for the degenerative changes in the organ of Corti. The histology of the labyrinth is difficult to study in man because of early postmortem changes, but the available work is reviewed.
The lecture by J. H. Northrop of the Rockefeller Institute on the "Dynamics of Pepsin and Trypsin" seems to have dispelled definitely another mystery of so-called colloid chemistry