COOPERATIVE RESEARCH: A CASE REPORT.

It is felt by the workers concerned in this cooperative venture that the real effort is just beginning. The hopefulness of undertaking to find arsenical and mercurial organic compounds which might be better than anything yet known for the treatment of syphilis of the central nervous system has been justified, and this is provoking greater optimism for the furture. So much promising study is in sight that enthusiasm among the group in increasingly evident at each meeting.

OBSERVATIONS ON BLOOD REACTION IN EXPERIMENTAL PNEUMONIA.

The correlation of the lung lesions and anemia in dogs suffering from experimental pneumonia induced by various organisms, with changes in the respiratory activity and in the acid-base relationship in blood, indicates that the developing acidosis, most marked in the severe cases, is due chiefly to the effects of an anoxic anoxemia.

THE LOSS OF CIRCULATING ERYTHROCYTES IN CERTAIN TYPES OF EXPERIMENTAL PNEUMONIA.

Erythrocyte counts, blood volume, hemoglobin, and hematocrit determinations on a series of dogs suffering from experimental pneumonia induced by the tracheal insufflation of Bacillus bronchiseplicus and Bacillus mucosus capsulatus indicate that in this condition there is an actual loss of circulating erythrocytes, without compensatory regeneration. Postmortem examination of the organs of these animals revealed red cells in various stages of degeneration in the capillaries and tissue spaces of the lungs, liver, spleen, and intestinal walls.