Secondary education he received in the then mining case, and in 1834 he entered the Physics and Mathematics Faculty of St. Petersburg University. Then under the influence of well-known professor SS He became Kutorga preferably engage in the natural sciences, especially botany. In 1838 Zheleznov was added to a scientific expedition to Khiva join the war, but the first one was suddenly canceled. In 1848 Zheleznov was again appointed to the number of members of the French polar expedition; but on the outskirts of St. Petersburg head of the expedition, the famous naturalist Gemara, participated in the expedition of Russian scientists was rejected. Despite these setbacks, iron persistently engaged in science, and in 1840 received a master`s degree for the essay "On the development of the flower and eggs in Tradescantia virginica L.", and in 1842 - a doctorate, again to work on the embryology of higher plants. On the same subject made them more work, namely the development of peach blossom. Meaning of embryological work was appreciated only in the late thirties famous Schleiden. Zheleznov first after Schleiden made with similar works and greatly contributed to their introduction to the science, earning forever the place of honor in the history of science. Being a doctor, he went abroad to study agriculture. St. Petersburg University of the Free Chair of Botany was replaced Shihovskim, whose work was subsequently void. Upon returning iz-za border, where he traveled for 3 years, he again has no place, and only in 1847, after a trip to Russia to study its agriculture, he was appointed a professor of agriculture at the University of Moscow. Since then Zheleznov dedicates itself to agriculture, leaving, however, botanists and joined here even meteorology. In his estate Naronove Novgorod province, he gave the right meteorological observations, which gave excellent results. In 1853 Zheleznov was elected to the Academy of Sciences of adjuncts in plant physiology. Until the end of his life he never ceased to work and left not a few valuable works. In addition, he had to take an active part in the great cause of the liberation of peasants from serfdom. He was a member of the government, and at the same time, already on the election of a member of the drafting committee and the committee clerk. From 1858 to 1861 on Zheleznova fell the heavy duty of the struggle for the idea of ??vesting released land to the peasants. In this struggle, he made many enemies, but stood firmly for the truth and those certainly deserve warm thanks to the offspring. Since 1861 he served as Director Zheleznov Petrovskaya Agricultural Academy. This post he left in 1869 he moved to St. Petersburg, he gave himself a scientist studies. For completeness Zheleznova characteristics should be added, that he knew and loved art, well owning a pencil and brush. He did not leave a large multivolume works; but many of his works undoubtedly contributed to the success of science and the movement forward. From his works we present the following: "On the Origin of the embryo and plant proizrozhdeniya theories" (1842); "Sur l`embryogenle du meleze". ( ". Bull.-Soc Nat.", M., 1849); "Recherches sur la quantite et la repartition de l`eau dans la tige des piantes" (1875); "Meteorological observations in the village Naronovo" (1854 - 62); "On the propagation of white truffle in Russia" ( "Journal of the Society of Horticulture," 1873); "The cultivation of hops in the middle of Russia" (1851); "Hop in Guslitsa" (1876), etc., all -. More than 60 works. Obituary Zheleznova in "Proceedings of the St. Petersburg Society of Naturalists" for 1877, made another Zheleznova Karl Fedorovich Kessler. A. Beketov.