1.Previous
3.Next

ameliorated using a single standard with lines marked on the bar. Regarding the two methods by which the effect of temperature was taken into account, Ibáñez used both the bimetallic rulers, in platinum and brass, which he first employed for the central base of Spain, and the simple iron ruler with inlaid mercury thermometers which was used by the Swiss Geodetic Commission. On the sidelines of the Exposition Universelle (1855) and the

1.Previous
3.Next