'The burning of logging slash has been a common practice in the Pacific Northwest ever since the introduction of clear-cut logging. In those days of low stumpage and log values no one needed to be too careful of the amount of damage done and the whole business was handled pretty casually. Today, in 1961, with high stumpage and timber values everyone expects good burning but the job still depends almost completely on experience and knowledge of fire behavior. Classified information and proven facts are simply not available in any worthwhile amount. Many of the gaps in our knowledge can be bridged by experience, but it would be far more satisfactory if as many as possible were closed by factual information that reasearch alone can provide.'