We are informed that nine hundred pounds of dead weight of wire were placed on it for nearly five days, without injurious effects. This fabric is stretched on a frame, as seen in the first engraving, the proper tension is secured to suit the fancy, and the mattress is ready for use. It is then set into the bedstead, like the ordinary spring bed, except that only two slats are used to support it. Thus, with a slight covering in summer, and a thin hair mattress for warmth in winter, a most perfect sleeping arrangement is secured. The first adaptation of the wire mattresses was for private houses, but they have been found to have special advantages for hospital use. They have been largely introduced into the Hartford Hospital, the Bellevue Hospital, New York, and the Marine Hospital, Brooklyn, and have proved to be, after months of the severest use, with all classes of patients, a very great success for such purposes. The elastic flexible mattresses yield to every motion and part of the body, much to the relief of the suffering patient. Another very great advantage is, that when carefully painted they are always clean. Pillows of the same materials are made soft and pliable by using a fine wire and small coil. They are always cool, and afford the opportunity of placing bags of ice under the head in case of sickness. One of these mattresses and a bedstead and pillows complete--all of which the Company make--furnish, with the addition of a folded blanket or comfortable, a perfect outfit for hospital use. They are particularly useful for ships' berths, as they dispense with the ordinary bottom, and the sacking and thick mattress. Shippers know this. We are assured that a coating of paint, carefully applied to the well-tinned wires will protect them from rust. There can be no question but that these beds, with a light covering--scarcely more than a sheet--are especially adapted for hot climates. The Company have already orders for them for the Brazilian market, and they have been introduced into many of the Southern States. This wire fabric is adapted to other articles of furniture, and is used in place of the ordinary springs in chairs, sofas, etc. For out-door settees, lounges, car seats, and other like purposes, it is well adapted. Three patents have been issued to the Company on the wire mattress, through the Scientific American Patent Agency. [See advertisement of the Woven Wire Mattress Company on another page.] * * * * * Flouring Mill Hazards. A correspondent, in discussing the causes of fires in flour mills, gives the following facts and queries: "F. Bertchey's mill, at Milwaukee, burned in September last. The fire originated from a candle held near a bran or feed spout, reaching from the upper to a lower floor. The ignition was instant, and attained different points of the building at about the same moment.