he knew so well to give to his own dwellings. His sons in quick response to the father's wishes with a generous piety have carried out his plans. Mr. Page, the architect, had submitted his sketches to Mr. Agassiz and had had frequent conferences with him before he left the country in December, 1909. His death on March 27, 1910, of necessity caused some delay in the progress of the work, but the plans had been so fully developed that there seemed no doubt as to his intentions and the architect under the direction of the sons and of your committee has faithfully and successfully brought the building to completion. Kings and ambitious noblemen have in other lands and other times been patrons of learned societies and have provided sumptuous accommodations for them. Our house is believed to be the only abode of a scientific society built by a member of the body and devoted to the unrestricted uses of his fellows. If Agassiz had lived to see the completion of this house, it is safe to say that neither his name not his features would have appeared upon these walls. What his singular modesty would have forbidden to him living has been done in the one instance by the authorities of the Academy, and in the other by the loving hands of one of his own family. In the great Museum at Cambridge is the monument of two great men of science laboring in the service of science alone. Here in this pleasant house and home may their associates and successors for all time remember the gracious spirit of him who asked only of his fellows a kindly remembrance. May we not speak of him in the words which our own poet used in describing another of our greatest and best loved associates, The wisest man could ask no more of fate To feel mysterious Nature ever new; To touch, if not to grasp, her endless clue, O friend of this house and all who gather here, not of a day but for long years to come may your place still be here to welcome by this visible presence the generations of this Academy, till this solid structure which you have built and all that it contains shall sink in dust. 1. HAYES, H. C.- An Investigation of the Errors in Cooling Curves and Methods for Avoiding these Errors; Also a New Form of Crucible. pp. 1-22. 6 pls. May, 1911. 70c. 2. WILLSON, R. W.- Determination of the Altitude of Aeroplanes. 2 pls. May, 1911. 55c. 3. DALY, R. A.- The Nature of Volcanic Action. 1911. $1.15. pp. 23-43. pp. 45-122. 5 pls. June, 4. WARREN, C. H., and PALACHE, C.- The Pegmatites of the Riebeckite-Aegirite Granite of Quincy, Mass., U. S. 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W.- The Measurement of Hydrostatic Pressures up to 20,000 Kilograms per Square Centimeter. pp. 319-343. December, 1911. 40c. 12. BRIDGMAN, P. W.- Mercury, Liquid and Solid, under Pressure. pp. 345-438. 1 pl. December, 1911. $1.20. 13. BRIDGMAN, P. W.- Water, in the Liquid and Five Solid Forms, under Pressure. pp. 439-558. 3 pls. January, 1912. $1.60. 14. WEBSTER, D. L.- On an Electromagnetic Theory of Gravitation. pp. 559-581. January, 1912. 40c. 15. BAXTER, G. P., MOORE, C. J., and BOYLSTON, A. C.— A Revision of the Atomic Weight of Phosphorus. pp. 583-605. January, 1912. 40c. 16. SMALLWOOD, W. M.- Polycerella Zoobotryon. pp. 607-630. March, 1912. 45c. 17. PEIRCE, B. O.- The Anomalous Magnetization of Iron and Steel. pp. 631-670. March, 1912. 75c. 18. SANGER, C. R., and RIEGEL, E. R.- Pyrosulphuryl Chloride and Chlorsulphonic Acid. pp. 671-718. March, 1912. 70c. 19. THOMSON, E.- The Fall of a Meteorite. pp. 719-733. March, 1912. 30c. 20. PHILLIPS, H. B., and MOORE, C. L. E.- An Algebra of Plane Projective Geometry. pp. 735-790. March, 1912. 80c. 21. PIERCE, G. W., and EVANS, R. D.- On Electrical Properties of Crystals. (I.) Stratification and Capacity of Carborundum. pp. 791-822. 1 pl. March, 1912. 60c. (Continued on page 2 of Cover.) PUBLICATIONS OF THE AMERICAN ACADEMY OF ARTS AND SCIENCES. MEMOIRS. OLD SERIES, Vols. 1-4; NEW SERIES, Vols. 1-13. 16 volumes, $10 each. Half volumes, $5 each. Discount to booksellers 25%; to members 50%, or for whole sets 60%. Vol. 11. PART 1. Centennial Celebration. 1880. pp. 1-104. 1882. $2.00. PART 2. No. 1. Agassiz, A.- The Tortugas and Florida Reefs. pp. 105-134. 12 pls. June, 1885. (Author's copies, June, 1883.) $3.00. PART 3. Nos. 2-3. Searle, A.- The Apparent Position of the Zodiacal Light. pp. 135-157 and Chandler, S. C.- On the Square Bar Micrometer. October, 1885. PART 4. No. 4. $1.00. pp. 158-178. Pickering, E. C.-Stellar Photography. pp. 179-226. $1.00. 2 pls. March, 1886. ᏢᎪᎡᎢ 4, No. 5. Rogers, W. 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