PI^OROIIIS ARCHITECT A. 



Dissertaticn, 



Snbmitt'^a +-g the Board of Univf;rsity Studied of the 

 Johns riopkins University ixi confonrdty with the require 

 merits for the dee; re e of Doctor of Philosopny. 



By 

 Rheinart Parker Cov/les. 



February, 1904. 



