sentences:  Jean Alexander Heinrich Clapier de Colongue
  
  Jean Alexander Heinrich Clapier de Colongue (; ) (–) was a Baltic German marine engineer and founder of a theory of magnetic deviation for magnetic compasses, living and working in Imperial Russia.Ivan Petrovich de Collong was born in 1839 in Dünaburg (now Daugavpils) into a Baltic German noble family originally of Franco-Portuguese origin.