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Julius H. Kroehl

German-American inventor and engineer
Julius Hermann Kroehl was a German American inventor and engineer. He invented and built the first submarine able to dive and resurface on its own, the Sub Marine Explorer, technically advanced for its era. His achievements in architecture, civil... Wikipedia
Died: September 9, 1867 (age 47 years), Panama City, Panama
Significant design: Sub Marine Explorer; Mount Morris Fire Watchtower; Flange forming machine; dome for the New York Crystal Palace