PRACTICAL 



A TEXT AND REFERENCE WORK FOR EN- 

 (1 INKERS, ARCHITECTS, BUILDERS, DRAFTSMEN 

 AND TECHNICAL SCHOOLS; ESPECIALLY ADAPTED 

 TO THE NEEDS OF SELF-TUTORED 



BY 



ERNEST McCULLOUGH, C.E. 



MEMBER AMERICAN SOCIETY CIVIL ENGINEERS; CONSULTING 

 INEER; LICENSED STRUCTURAL ENGINEER AND 

 LICENSED ARCHITECT, STATE OF ILLINOIS 



AUTHOR OF "ENGINEERING AS A VOCATION," "PRACTICAL 



SURVEYING," "ENGINEERING WORK IN 



TOWNS AND CITIES," ETC. 



U. P. C. BOOK COMPANY, INC. 



243-249 WEST 39TH STREKT 



NEW YORK 



1918 

 5 ) 



