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POPULAR SCIENCE MONTHLY. 



original research to teaching, or at least equal prominence is 

 given to both. The psychological laboratories at the university- 

 are situated in the biological building. Psychology, as one of the 

 sciences of human life, thus takes its place among the other bio- 

 logical sciences. Its connection with philosophy has been a close 

 one, and will probably always remain so. Physiological and 

 experimental psychology are required courses in the philosophy 

 group of undergraduate studies, as well as forming parts of the 

 natural history and biological courses. The work of this depart- 

 ment consists of undergraduate courses in physiological and 



Laboratory of Experimental Psychology. 



experimental psychology and graduate courses of comparative 

 studies of systems, child psychology, and laboratory work. The 

 laboratories have a complete equipment of all necessary appa- 

 ratus, including instruments for measuring the time it requires 

 to react to a sound, light, touch, or electric spark. The essential 

 instruments of the series are two time-recording devices, the 

 chronoscope and the chronograph. By means of many experi- 

 ments with the chronoscope, it has been found that multiplication 

 and division are longer processes than addition and subtraction. 

 Thus, it takes every subject a little longer to think that two times 

 five is ten than that two plus five is seven. Experiments with the 

 chronoscope are being made on the simple reaction time of all 

 classes of persons, and on the time that it requires them to per- 

 form simple movements. The movements tested are of the right 



