That is described as follows: “A smooth face of soil is cut through the plant axis vertically to sufficient breadth and depth to insure inclusion of the farthest ramifications of the root system in the plane of the bisection. Horizontal and perpendicular lines are marked off on this face with cord, the interval suited to the size of the root system. Then by means of a fine jet of water the soil is removed from the whole of the face of the bisection to a depth of one or two inches. The result is a bisection of the root system which may be drawn in detail. A second face perpendicular to the first gives a half bisection which may be used as a check against the first to insure a representative sample of the entire root system.” In 1939 he published a paper showing that warts or tumors on the bark of Celtis are probably initiated by mechanical injury. He wrote letters published in the American association for the advancement of science on common uses of plants for Christmas decoration, commenting on them as a fire hazard and the potential to have chemicals such as ammonium sulfate or calcium chloride absorbed through the cut and of the tree which can make the tree less flammable along with the method to do so. The other letter that was published was on mistletoe in legend and in science describing the various species that are called mistletoe and comments on the possibility of its use in the biblical story of its significance. Ecology Seminar, the quarterly he founded has also been one of the longest lasting quarterlies in the states and continues to be offered. Awards and honors Muller was named Faculty Research Lecturer in 1957, the third faculty member at UCSB to receive the title, honoring distinguished research achievement both locally and abroad. In 1975 Muller was honored for his work in ecology by being named Eminent Ecologist for 1975, a prestigious award given by the Ecological Society of America. He was also honored for his work in oak systematics by having two plants named after him: Quercus cornelius-mulleri and Quercus mulleri. The library at UCSB's Cheadle Center for Biodiversity and Ecological Restoration is named in his honor. References External links Biography by R.H. Whittaker at Ecological Society of America The Cheadle Center for Biodiversity and Ecological Restoration at UCSB 20th-century American