TUNNELING: 



A PRACTICAL TREATISE 



PLEASE (JETUttN TO 

 DEP7. of APPLIED MECHANICS. 



BY 



CHARLES PRELINI, C. E. 



WITH ADDITIONS BY 



CHARLES S. HILL, C. E. 



ASSOCIATE EDITOR "ENGINEERING NEWS" 





DIAGRAMS AND ILLUSTRATIONS 



SECOND EDITION, REVISED. 



NEW YORK: 



D. VAN NOSTRAND COMPANY 



23 MURRAY AND rj WARRKM Sn. 



1902 



