Show Rise an and d Fall of f U Boat U-Boat j Destructiveness ss J j v. v ww merchantmen of more than 1600 tons lost Phe he total of British ing the week eek ended Sunday May 13 is the lowest to be record- record weeks The water high-water by the British admiralty in three rk reported so far was reached during th the week ended April when forty vessels of that category were werf sent to the bottom losses as officially reported in London i list of British shipping I boat U-boat boat U-boat warfare went into II unrestricted when 1 I ce e l 1 Alary iary I f ct lows Over Under I 1600 Tons I First three days after February 1 1 5 53 Week ended February 10 33 19 Week ended February 17 17 10 Week ended Fe February 24 27 18 Week ended March 3 i 14 9 Week ended March larch 11 11 13 4 Week ended March 18 16 8 Week ended March 25 18 7 Week ended April 1 1 v. v 18 13 13 Week ended April AprilS 8 S. S 17 2 2 2 W Week ek ended April 15 19 9 Week ended April 22 40 15 Week ended April 29 38 13 Week ended May 6 6 I 24 22 Week ended l May lay ay 13 22 17 Total to 14 date Fishing vessels trawlers and craft under tons are not in- in ded in this list |