EntityQ4539854· pop 6· linked from 53 articlesLeonard JaczewskiSign in to savePolish-Russian explorer, geographer, geologist, cartographer, and mining engineer (1858–1916)ConnectionsgeomorphologyEntityKazakhstanCountryRussianEntityMongoliaCountryWarsawEntityPolishEntityecologyEntitygeologyEntityarchaeologyEntitySiberiaEntitymeteorologyEntityRussian EmpireCountryglacierEntityYekaterinburgEntityUral MountainsEntityIrkutskEntityYakutskEntityWayback MachineEntityengineerEntityYeniseyEntityCategories1858 births1916 deaths19th-century explorers from the Russian Empire19th-century geographers19th-century Polish engineers19th-century Polish geologists20th-century Polish engineers20th-century Polish geographersCartographers from the Russian EmpireDeaths from stomach cancerGeologists from the Russian EmpirePeople from Congress Poland