Show COAT TUB THE SEA A number 0 of coal mines bro aro being worked wor liall under the ocean in northumberland tho ilia quantity of 0 coal under the sea nea is estimated at toua ton noil on I 1 on tho the D arbaut coast under the ibo sea ben including a breadth of three and a bail miles milca with an aroa area ot of wicenty OLO square miles milb a tons the tailor lutter ra balno na ii in st veta vein ol of an aggregate thick rem of thirty feet distributed ja in six aps ties Engi are consil considering ering how it can he bo worked successfully lit in the iho future |