SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



Bulletin 173 



CATALOG OF THE MECHANICAL COLLECTIONS 

 OF THE DIVISION OF ENGINEERING 

 UNITED STATES NATIONAL MUSEUM 



BY 



FRANK A. TAYLOR 



UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON : 1939 



For lale by the Superintendent of Documents, Washington, D. C. 



Price 50 cents 



