68 REPORTS ON INVESTIGATIONS AND PROJECTS. 



matization experiments, and it may be found advantageous to enlarge this by 

 the purchase of an additional tract already in use. The apparatus and instru- 

 mental equipment of the laboratories has been enlarged only by conventional 

 types and no new designs have been brought into use during the year. 



Quarters and facilities for the photochemical work of Dr. H. A. Spoehr 

 have been furnished from the regular equipment of the Kent Chemical 

 Laboratory of the University of Chicago, by the courtesy of the officers of 

 the chemical department of that institution. The greatest efficiency in deal- 

 ing with some of the problems of photochemistry of direct importance in 

 physiological research may be reached in localities offering the least inter- 

 ruption to daily exposure to sunlight and with adequate sources of power 

 for controllable illumination. Some further experience will be necessary 

 before plans for the final equipment may be made. 



