Another Steam-6o Erplosion.-An extract of letter received at Philadelphia, under date of Pittsburgh, April SOth. states, that the steam boat Home, which had just arrived there. brought intelligence of the steam boat Caledonia having burst boiler near the mouth of the Ohio, about the 22d of April, on her passage from New Orleans to Louis vile. Two of the crew killed, and twelve of the passengers jumped overheard and were drowned. The boat is heavily insured at Cincinnati.

 The Philadelphia Gazette gives the follow ing:-

 We have conversed with gentleman who was passenger on board the Caledonia. He was i'll in his birth when the accident occur red. Fastening to the deck. he witnessed a scene of terror and confusion which it is im- possibIB to describe. The passengers and crew made up a multitude of .fve hundred.- Some of these were wounded, some were dead.-Those that were uninjurrd. were en- deavoring to save themselves and their prop erty; and each in endeavoring to accomplish his own object. increased the difficulty and the danger of escaping from the boat. A number of trunks were hastily thrown from the boat towards the shore. Some of these fell into the water. Our informant saw one unfortunate passenger, who had jumped O. verboard struck on the head by trunk, and he thinks others perished in like manner.

 Among the passengers who were injured, was gentleman who had been injured by the explosion on board the Helen Nc Gregor. He had just recovered from his wounds, when he experienced the second disaster on board the Caledonia.

 The gentleman with whom we have con- versed. thinks the boiler was defective; but IS of opinion that the immediate cause of the accident was the boats being thrown out of rum, by the passengers pressing on one side 10 view the scenery. In this way he thinks the water was thrown on one side ofthe boil CT. and the other side exposed to the direct action ofthe fire.

 Extract of letter from the clerk of the steam. boat Caledonia. dated gath ult. near New Madrid. to the owners-"I have the melancholy duty to let you know, that on the l8th inst. the larboard boiler of the Gale donla burst, killing and wounding about Is passengers, and of the crcw or were blown overheard and lost. Some of the wounded will recover, although badly wOund- ed. The boiler burst in the side i0hiie the ooas tcos under ,00a, and about two miles af- Ter having wooded. The iron of the boiler must have been defective, as it has been but one year m service. We had a very heavy freight. with 400 deck and 50 cabin Passen- gers' which with the crew, amounted to near SUO S., souls. The hun of the boat is uninjured. We are now in tow of the Paul Jones, and days. MI 7ea. ',''',' Fsg

 IA Cincinnati paper of later date gives me names of all the persons injured by the al oove accident, by which it appears there were "lae killed. seUea badly and eight slight y wounded. The accident Is aseTibed to al defect in one of the hoilcrs.J 5.', 7