THE 



PRINCIPAL 



THEIR CHARACTERISTIC PROPERTIES. 



BY 



CHARLES HENRY SNOW, C.E., Sc.D., 



Dean of the School of Applied Science, New York University; 

 Member of the American Society of Civil Engineers, etc. 



FIRST EDITION. 



FIRST THOUSAND. 



NEW YORK : 



JOHN WILEY & SONS. 



LONDON: CHAPMAN & HALL, LIMITED. 



1903. 



