investigator to effect this decomposition and to prove it by mechanically reproducing the curve in question through combinations of the elements involved. The best way of showing the 
Fig. 5.—Harmonic Analyzer. amount and character of the work done in this physical laboratory is to present a list of the researches completed or in progress during the year:
Researches Completed or in Progress during the Year.—(1) Relative Motion of the Earth and Ether—Head Professor Michelson; (2) A New Harmonic Analyzer—Head Professor Michelson and Associate Professor Stratton; (3) Production of Standards of Length by Means of Light Waves—Head Professor Michelson and Associate Professor Stratton; (4) Attempt to Measure the Superior Limit to the Size of Molecules by Capillarity—Head Professor Michelson and Associate Professor Stratton; (G) Deposition of Metals in High Vacua by the Electric Discharge—Associate Professor Stratton and Dr. Mann; (7) Study of Electric Waves by Means of the Interferometer—Mr. Hull; (8) Coefficient of Viscosity—Mr. Johonnott; (9) Resistance of Thin Metal Films—Miss Isabelle Stone; (10) Mechanical Equivalent of Heat—Mr. Smith; (11) Application of Interference Methods to Spectroscopic Measurements—Mr. Rice; (13) Velocity of Cathode Rays—Mr. Morrison.
One of the most thoroughly organized scientific departments in the university is that of geology, under the direction of Prof. Thomas C. Chamberlain, who has associated with him seven helpers. Perhaps nowhere in America is this work so carefully divided. The broad way in which it is treated at the University of Chicago is indicated by the list of workers: In geology proper, Profs. Chamberlain, Salisbury, and Van Hise lay general foundations; Farrington in mineralogy, Iddings in petrography, Salisbury in physiography and geography, Weller in paleontology. Holmes in anthropic and graphic geology, and Penrose in economic geology form a strong corps of specialists. The department aims at systematic training in its subject, either in con-
