We perceive by an exchange that the insurance companies of St. Louis have just determined to purchase two new steam fire engines, they having become satisfied regarding the superiority of such fire-extinguishers by the operation of two which have been used for some time in that city. In Cincinnati steam., fire-engines are now exclusively employed, and Chicago has either one or two. Our Eastern corporations are ratherfoggy on this subject. The first woolen mill on the Pacific Coast has been set in operation in Salem, Oregon. It runs four hundred and eighty spindles.