Explosion of a Powder Mill, &c.
New Orleans, Dec. 29.
--Last night the Powder Mill opposite to this city exploded.--The guard had inspected the premises half an hour before the explosion, and it is believed that the explosion was caused by an incendiary.
All the powder, except about 1,000 pounds, was removed on yesterday.
The stock of saltpetre and brimstone was in another building, and was saved.
Another mill will go into operation in a few days, and the loss of the mill will not affect the Government supply.
The remains of Capt. Samuel G. Risk were interred to-day with military and masonic honors.