F FRIDAYTHE STEAMBOAT FIRE AT ST.liOUIS.Additional Particulars-Value of Property Destroyed—Insurance—Incidents.From the Democrat, of Wednesday.The steamboat conflagration of Monday night, involving the total tiestruction of seven very good steamers and a considerable amount of property on board, was but a repetition of an oft occurring calamity in our harbor. At va? rious times during the past twenty-five years the press of this city has given its views in regard to precautions against such calamities, and proposed plans to prevent the spreading of flames from vessel to vessel, but these admonitions have not been heeded. That no lives were lost, or, at most, only one, by the last conflagration, is a very pleasant reflection. But there will be other steamers destroyed, no doubt, and there may not be always the same immunity from loss of human life. We supply some incidents and some matter of information in regard to the fire and the steamers burned, that may prove of interest: .