otal tonnage of 316,204 were sunk:

Week Ending Over Under Fishing
1,600 Tons 1,600 Tons Vessels

March 4 14 9 3
March 11 13 4 3
March 18 16 8 21
March 25 18 17 10
April 1 18 13 3
April 8 17 2 6
April 15 19 9 12
April 22 40 15 9
April 29 38 13 8
May 6 24 22 16
May 13 18 5 3
May 20 18 9 3
May 27 18 1 2
June 3 15 3 5
June 10 22 10 6
June 17 27 5 0
June 24 21 7 0
July 1 15 5 11
July 8 14 3 7
July 15 14 4 8
July 22 21 3 1
July 29 18 3 0

These figures show that in twenty-two weeks England lost 438 vessels
over 1,600 tons, 170 vessels under 1,600 tons, and 187 fishing
vessels. The average tonnage of vessels over 1,600 tons has been said
to be 4,500. On that basis the loss in this class alone would amount
to about 2,000,000 tons. If we add to this the total loss during
February, 1917, and an approximate figure representing the loss of
vessels under 1,600 tons and of fishing vessels, it is safe to assume
that the total loss suffered by the British merchant marine between
February 1, 1917, and July 29, 1917, was about 2,650,000 tons.

On June 30, 1917, the German admiralty claimed that since the
beginning of the war more than 5,500,000 tons of shipping available
for Great Britain's supply of food, munitions, and materials had been
destroyed up to June 1, 1917, and that, on that date, there was
available for this purpose from all sources only about 4,500,000 tons
which, it was claimed, could be destroyed at the rate of from 800,000
to 1,000,000 tons a month.

Of the other Allied countries only France supplied from time to time
definite figures. During February, March, and April, 1917, seventeen
French vessels were sunk while nine others were attacked, but escaped.
During