Question:
Which position did José Echegaray hold in Oct, 1870?

Context:
 José Echegaray holds the position of Member of the Senate of Spain from Jan, 1900 to Jan, 1900. 
 José Echegaray holds the position of Minister of Public Works of Spain from Jan, 1870 to Jan, 1871. 
 José Echegaray holds the position of Vocal of the Junta para Ampliación de Estudios e Investigaciones científicas from Jan, 1907 to Jan, 1907. 
 José Echegaray holds the position of Minister of the Treasury of Spain from May, 1874 to May, 1874. 
 José Echegaray holds the position of Member of the Congress of Deputies from Feb, 1869 to Feb, 1869.

Answer:
Minister of Public Works of Spain