results, but became Reinecke's first experience of practical hydrography. In February 1826, Reineke was appointed as the chief of an expedition on the shores of Lapland, and in the summer of the same year his expedition described the shores of the Kola Bay, the Tuloma River, and the western part of Lapland, for which Reinecke was awarded the Order of Saint Anna of the 3rd degree. During 1826, the brigantine Lapominka and two small schooners, Nomer 1 and Nomer 2, were built in Arkhangelsk specifically designed to work in the White Sea, and on 4 March 1827 Reinecke was appointed head of the White Sea expeditions. Over the next six years, Reineke spent every summer sailing, conducting hydrographic studies that ended in the fall of 1832. For these studies Reinecke was awarded an additional salary and promoted to the rank of captain-lieutenant. The result of the six-year work of the expedition was information which appeared in 1833-1834 Atlas of the White Sea and the Lapland coast, the text of which was published in two volumes, in 1843 and 1850, under the title Hydrographic description of the northern coast of Russia, -light. M. Reineke for which Reinecke was awarded the full Demidov Prize by the Imperial Academy of Sciences. Three lighthouses were built, on Cape Tersky Orlov and on the islands of Morzhovce and Zhizhgin, as a result of Reinecke's expeditions. From 1833 to 1852, Reinecke was engaged in hydrographic research in the waters of the Baltic Sea. In 1840, Reineke was awarded the rank of captain, and on 6 December 1849 was promoted to Major General. On the basis of fifteen years of observations, Reinecke determined the average sea level and stamped it onto the granite of the Kronstadt Blue Bridge in Saint Petersburg. The accuracy of Reinecke's sea level measurement was so high that over time the Blue Bridge stamp became the standard in Saint Petersburg and then became the starting point of Russia's entire leveling network, and later long-term measurements confirmed the accuracy of the stamp and no adjustment was required. By 1853, Reinecke began to suffer from ill health, and through the advice of doctors went to the Crimea to recuperate. Reinecke visited Admiral Pavel Nakhimov, his friend from the marine cadet academy, at his return to Sevastopol following Russian victory at the Battle of Sinop. In June 1855, Reinecke left Crimea to return to Saint Petersburg,