Mr. Eastman's six breech-loading cannon, recently imported from America, were tried on the Arsenal Wharf, Woolwich, under the supervision of Lieutenant-colonel Wilmot, superintendent of government gun factories at Woolwich, and having been twice fired with a double charge of blank cartridgenamely, 20 Ibs. of powderthey were examined, and found to have stood the test satisfactorily. From their enormous weight (17 tuns) they did not evince the slightest recoil.London paper