smoke and dust may act accumulatively so as to produce not only an excess death rate but an increase in it, continuing possibly even after there has been some improvement in the control of the smoke and dust nuisance. It seems also highly probable that there is a tendency to report pneumonia as a cause of death somewhat more freely than elsewhere; different habits in reporting from time to time and from place to place are not unknown, and indeed are unavoidable. No satisfactorily sure conclusions can, however, be reached as to the cause of Pittsburgh's excess mortality from pneumonia or its increase without a prolonged carefully controlled scientific study of all phases of the situation, social, statistical, and in particular physical and physiological. The situation is so bad that it is to be hoped that any efforts of the Department of Health of the City of Pittsburgh to deal with this problem will meet cordial support; but until the proportionate influences of the various causes have been ascertained all palliative measures must be tentative and their results critically examined. Insofar as the matter is one of industrial hygiene, as it seems in no small measure to be, it is important to have the active coöperation of the industry in studying the condition and in combatting it, and it is probable that rational efforts of the industry would be repaid not only in civic betterment but in lessened costs of production. HARVARD SCHOOL OF PUBLIC HEALTH, BOSTON, MASS., April, 1924. INDEX A Address, annual, of President, v inheritance by tetrad sibs in Ames, Herman V., amending the fed- Andrews, Chas. McL., elected to mem- Angell, James Roland, elected to Anonymous pamphlet, authorship of, I Antioch, chalice of, xiv Atoms, periodic table of, xii B Bacteria, luminous, and fishes, x Bateman, Harry, elected to member- Baths, effects on man, iv Bauer, Louis A., earth's magnetic and Bazett, H. C., effects of baths on man, Bazzoni, C. B., under voltage areas in Benedict, Francis G., basal metabol- Blakeslee, Albert Francis, elected to Boas, Franz, speaker at symposium, Bodine, J. H., temperature and rate of British colonies, acquisition of, I Burns, Keivin, relativity and solar arc C Campbell, W. W., elected vice presi- Carbon dioxide excreted by nerve Carson, Hampton L., elected vice Coblentz, Wm. H., awarded John Cœnobic plants, variants in, vi Commerce, obstacles to international, V de Constant, d'Estournelles, deceased, Constitution, amending the federal, Crew, Henry, elected councillor, x D Dahlgren, Ulrich, symbiotic luminous Danish dialect of Bornholm, 190, iv Davis, John William, elected to mem- Depth finder, sonic, 134, xi Dunn, Gano, elected to membership, x E Earth, magnetic and electric fields of, Eclipse, solar, of 1923, iii Eddington, A. S., the interior of stars, Eigenmann, Carl H., fishes used F Faunal life zones, vii Farrand, Livingston, elected to mem- Federal Constitution, provision for Kofoid, Chas. A., elected to member- Kramer, Henry, deceased, xiv L Language, the scientist and an inter- Le Conte, Robt. G., deceased, xiv Leverett, Frank, elected to member- Light, deflections in sun's gravitation Lingelbach, Wm. E., elected council- Loeb, Jacques, deceased, iv Lusk, Graham, elected to member- M MacDougal, D. T., plasmatic layers Manichæism, fate of soul in, iv McCollum, Elmer Verner, awarded Medals, John Scott, awards of, xiii Allen, Chas. E., vi Members deceased: de Constant d'Estournelles, xiv Members elected: Allen, Charles E., vi Farrand, Livingston, x Mendenhall, Chas. membership, x E., elected to Miller, Dayton C., visible sound-Fri- Miller, John A., elected secretary, ix Mitchell, S. A., elected to member- Modjeski, Ralph, awarded John Scott Morris, Roland S., address on pres- Pearl, Raymond, curve of population Permeability and cell reaction, v Plants, plasmatic layers and cell walls Pneumonia in Pittsburgh, 279, v Population, curve of growth of, 10, vi Prince, John Dyneley, the Bornholm President, annual address of, v Sadtler, Sam'l P., deceased, iii St. John, Charles E., exploring the Santa Cruz beds of Patagonia, fauna Scott, John, medals and premiums, Scott, Wm. B., elected president, ix fauna of the Santa Cruz beds of Sex, right and left in bird's body, 152, Shull, Geo. H., inherited factor in Sinclair, Wm. J., elected to member- fauna, oreodone beds, White Smith, Allen J., on insulin, iii Snyder, Monroe B., periodic table of Solar atmosphere, xii Sphærocarpus, inheritance in, 222 Stevenson, John J., deceased, xiv |