Fv 

a.,Hnmphl'eys, A. A., General, Chief of Engineers, and But. brig. Gen. 

l-{, 
Henry L. Arbot, Major of Engineers. Re p I y t 0 eri t i cis m s 
m ade b y D r. Hag e n,' director general of public works, 
Prussia, by . . . . .. 8. New-York 1878.