Primoz Trubar, a Slovene Protestant author, was the pioneer of Slovene literature. In 1550, he had the first two printed books published: Catechismuz and Abecedarium. In 1582 he gradually translated and printed the Bible. Janez Vajkard Valvasor, historian and member of the British Royal Society. His book "The Glory of the Duchy of Carniola", published in 1689, provided a vivid description of the Slovene lands of the time. In his works, he tried to collate the entire body of contemporary knowledge about this part of Europe. As result of his study of complex mechanisms which regulate the intermittent lake at Cerknica, he was elected a member of the Royal Society in London. Jurij Vega, the mathematician and ballistic expert established ballistics as a scientific discipline. His logarithmic tables were published between 1783 and 1797, and they remained the most commonly used technique for calculation until the introduction of electronic computers. Baron Ziga Zois, a patron and inventor, he encouraged literally and scientific aspirations. In 1778 he founded the first ascent of Mount Triglav, at 2864 meters the highest Slovene peak and the national symbol. He was also the key supporter of the first attempted flight in hotair balloon in 1794. Josef Ressel, an inventor of Czech-German origin, developed his idea for the screw propeller while he was working in Ljubljana. He patented it in 1827 and two years later, in Trieste, he became the first in the world to use it in civil navigation. Peter Kozler tired to define for the first time the ethnic borders of Slovene provinces in 1879. Jozef Stefan, Director of the Physic Institute in Vienna, founder of the Austrian School of Theoretical Physics and Vicepresident of the Academy of Science , discovered the law of radiation in 1879. This remains the only law of natural science to be discovered by a Slovene. With the help of leading experts he also established the quantitative measurement of electricity - and thus the science of electrical engineering. Edvard Rusjan was the first man to fly a powered aircraft in Slovenia and this region of Europe, at the end of 1909.