It has been stated recently that the second batch of iron-clads was nearly completed, and the vessels composing it would soon make their trial trips. The first ship finished was the Canonicus, built at Boston, and the second, the Tecumseh, constructed by the Messrs. Secor, at Jersey City. The latter was to be tried yesterday, but she could not be got into the stream, owing to a huge mud-bank. The Canonicus went on a trial trip at Boston on Monday last, the chief purpose of which was to test the value of the new gun-carriage invented by Captain Ericsson, and which, we believe, is used in the nine new monitors. The new carriage met with some derangement during the trial, and it will be some days ere the vessel will be ready for sea again.