IVAN PAVLOVICH PULYUI Ivan Pavlovich Pulyui Ukrainian German

IVAN PAVLOVICH PULYUI

Ivan Pavlovich Pulyui (Ukrainian: Іва н Па влович Пулю й; German: Johann Puluj) (2 February 1845 – 31 January 1918) was a Ukrainian-born physicist, inventor and patriot who has been championed as an early developer of the use of X-rays for medical imaging. His contributions were largely neglected until the end of the 20 th century.

BIOGRAPHY Ivan Pulyui graduated with honors from Theological Faculty of the University of Vienna (1869), later also from the Department of Philosophy (1872). In 1876 Pulyui finished his doctorate on internal friction in gases at the University of Strasbourg under supervision of August Kundt. Pulyui taught at the Navy academy in Fiume (Rijeka, Croatia) (1874– 1876), University of Vienna (1874– 1884) and the German part of the Higher Technical School in Prague (1884– 1916). He served as the rector of the Higher Technical School in Prague (German part) in 1888 -1889. Pulyui also worked as a state adviser on electrical engineering for Bohemian and Moravian local governments. In addition he completed a translation of the Bible into the Ukrainian language.

SCIENTIFIC CONTRIBUTION Pulyui did heavy research into cathode rays, publishing several papers about it between 1880 und 1882. As a result of experiments into what he called «cold light» Pulyui developed the Pulyui lamp which was mass-produced for a period. This device was also some kind of primitive X-ray tube, but it was not until Wilhelm Röntgen discovered the X-rays and published his experiments, that Puluj recognized the potential of his own device. He was nevertheless among the first who worked with XRays and used them for medical diagnostics.

SCHEMES AND PHOTOS OF PULYUI LAMP

THE FIRST X-RAY PHOTOS

Pulyui published his results in a scientific paper, Luminous Electrical Matter and the Fourth State of Matter in the Notes of the Austrian Imperial Academy of Sciences (1880– 1883), but expressed his ideas in an obscure manner using obsolete terminology. Pulyui did gain some recognition when the work was translated and published as a book by the Royal Society in the UK. Pulyui made many other discoveries as well. He is particularly noted for inventing a device for determining the mechanical equivalent of heat that was exhibited at the Exposition Universelle, Paris, 1878. Pulyui also participated in opening of several power plants in Austria-Hungary.

PULYUI'S DEVICE FOR DETERMINING THE MECHANICAL EQUIVALENT OF HEAT

SUPPORT OF UKRAINIAN CULTURE Pulyui is also known for his contribution in promoting Ukrainian culture. He actively supported opening of a Ukrainian university in Lviv and published articles to support Ukrainian language. Together with P. Kulish and I. Nechuy-Levytsky he translated Gospels and Psalter into Ukrainian. Being a professor Pulyui organized scholarships for Ukrainian students in Austria-Hungary.

HONOURS -Ukraine's Ternopil Ivan Pul'uj National Technical University is named after him. -A stamp published on the occasion of Pulyui's 150 th Birth Anniversary in 1995. -Streets in Kiev, Lviv and other Ukrainian cities has the name of Ivan Pulyui.

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