2. BARNETT, S. J., AND BARNETT, L. J. H.—New Researches on the Magnetization of Ferromagnetic Substances by Rotation and the Nature of the Elementary Magnet. pp. 125–216. July, 1925. $1.50. 3. BAXTER, G. P., AND COOPER, W. C., JR.—A Revision of the Atomic Weight of Germanium. II The Analysis of Germanium Tetrabromide. pp. 219–237. October, 1925. $0.75. 4. DANA, L. I.—The Latent Heat of Vaporization of Liquid Oxygen-Nitrogen Mixtures. pp. 241–267. October, 1925. $0.75. 5. PIERCE, GEORGE W.—Piezoelectric Crystal Oscillators Applied to the Precision Measurement of the Velocity of Sound in Air and CO_{2} at High Frequencies. pp. 271–302. October, 1925. $0.75. 6. BRIDGMAN, P. W.—Certain Physical Properties of Single Crystals of Tungsten, Antimony, Bismuth, Tellurium, Cadmium, Zinc, and Tin. pp. 305–383. October, 1925. $2.50, with 7 and 8. 7. BRIDGMAN, P. W.—Various Physical Properties of Rubidium and Caesium and the Resistance of Potassium Under Pressure. pp. 385–421. October, 1925. $2.50, with 6 and 8. 8. BRIDGMAN, P. W.—The Effect of Tension on the Transverse and Longitudinal Resistance of Metals. pp. 423–449. October, 1925. $2.50, with 6 and 7. 9. BOSCHMA, H.—On the Symbiosis or Certain Bermuda Coelenterates and Zooxanthellae. pp. 451–460. October. 1925. $0.50. 10. KENNELLY, A. E., AND SLEPIAN, ARTHUR.—Computation of the Behavior of Electric Filters Under Load. pp. 461–483. October, 1925. $0.75. 11. FRANKLIN, WM. S.—Indeterminism in the Physical World. pp. 485–502. November, 1925. $0.50. 12. YEH, CHI-SUN.—The Effect of Hydrostatic Pressure on the Magnetic Permeability of Iron, Cobalt, and Nickel. pp. 503–535. December, 1925. $0.50. 13. ROEBUCK, J. R.—The Joule-Thomson Effect in Air. pp. 537–596. December 1925. $0.75. 14. RECORDS OF MEETINGS; Biographical Notices; Officers and Committees; List of Fellows and Foreign Honorary Members; Statutes and Standing Votes. etc. pp. 597–710. December, 1925. $0.50. VOLUME 61. 1. LEWIS, FREDERIC T.—A Further Study of the Polyhedral Shapes of Cells. pp. 1–35. December, 1925. $0.50. 2. HEIDEL, W. A.—The Calendar of Ancient Israel. pp. 37–56. December, 1925. $0.50. 3. BRIDGMAN, P. W.—The Effect of Pressure on the Viscosity of Forty-three Pure Liquids. February, 1926. pp. 57–99. $0.75. 4. BRIDGMAN, P. W.—Thermal Conductivity and Thermal E.M.F. of Single Crystals of Several Non-cubic Metals. pp. 101–134. February, 1926. $0.75. 5. SLATER, J. C.—Measurements of the Compressibility of the Alkali Halides. pp. 135–150. April, 1926. $0.50.