SCIENCE AT THE UNIVERSITY OF CHICAGO. 789 



investigator to effect this decomposition and to prove it by me- 

 chanically reproducing the curve in question through combina- 

 tions of the elements involved. The best way of showing the 

 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 Mi- 

 chelson ; (2) A New Harmonic 

 Analyzer Head Professor Mi- 

 chelson and Associate Professor 

 Stratton ; (3) Production of Stand- 

 ards of Length by Means of Light 

 Waves Head Professor Michel- 

 son and Associate Professor Strat- 

 ton; (4) Attempt to Measure the 

 Superior Limit to the Size of 

 Molecules by Capillarity Head 

 Professor Michelson and Asso- 

 ciate Professor Stratton ; (6) Depo- 

 sition 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 Viscos- 

 ity 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 Meas- 

 urements Mr. Rice; (12) Velocity of Cathode Rays Mr. Mor- 

 rison. 



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 founda- 

 tions ; Farrington in mineralogy, Iddings in petrography, Salis- 

 bury in physiography and geography, Weller in paleontology, 

 Holmes in anthropic and graphic geology, and Penrose in eco- 

 nomic geology form a strong corps of specialists. The depart- 

 ment aims at systematic training in its subject, either in con- 



FIG. 5. HARMONIC ANALYZER. 



