It has been thought that the Eucalyptus would be a great boon to California in the way of fire-wood, but Dr. Baer has recently addressed the California Academy of Sciences on this subject, and insists that the wood is almost incombustible. He says it is impossible to fire a roof made of blue gum shingles, so that what may be lost in fire-wood may be again in making it a substitute for slate. Willows for Railroad Ties. - Mr. Jesse W. Fel1, of Bloomington, I11., has created some consternation in forestry quarters by asserting that the white willow makes durable timber for railroad ties. If this is borne out by good tests it would be an extremely valuable fact - so valuable that it is well worth waiting for the actual figures before making up one's mind that it is no good.