38 



CARNEGIE INSTITUTION 



EXPLANATION. 



SKETCH II. 



aaaa Units So'xioo', to be developed as in Sketch I, or variations from 

 that. 



d Vestibnle hall, .stairway, public office, etc., 6o'x4o'. 



cc Portico connecting the laboratories on ground and second floors. 



dd Courtis enclosed by portico. To be an uninterrupted colonnade on inner 

 side facing court, and to be a double colonnade between the buildings, 

 to permit air circulation . 



