pseudonym of Roger of Helmarshausen flourished 12th century German monk and writer. He is known for his De Diversis Artibus ( 1110-40), a thorough account of the techniques of almost all the known crafts of the early 12th century. From his writings it can be deduced that he was a practicing craftsman of the Benedictine order. Painter Theophilus Shickel Theophilus Presbyter Johannes Chrysostomus Wolfgangus Theophilus Mozart
pseudonym of Roger of Helmarshausen flourished 12th century German monk and writer. He is known for his De Diversis Artibus ( 1110-40), a thorough account of the techniques of almost all the known crafts of the early 12th century. From his writings it can be deduced that he was a practicing craftsman of the Benedictine order
born Aug. 22, 1889, Salem, Va., U.S. died Oct. 5, 1969, Fort Stockton, Texas U.S. zoologist and cell biologist. He received his Ph.D. from Yale in 1913. He was the first to show that the unusually large chromosomes in the salivary glands of Drosophila were particularly well suited for studies of genes and chromosomes. In the early 1930s he published a drawing of a section of a Drosophila chromosome showing more than 150 bands, which for the first time allowed the precise positions of genes to be determined