I ducked into the main branch of the New York Public Library at 42nd Street and Fifth Avenue on a cold January day and found myself in one of its frequent free exhibitions, this one on the halls of the third floor (there are also exhibits on the ground floor). The show was of prints by two nineteenth-century artists: the British J.M.W. Turner and the American Thomas Moran.

Sublime: The Prints of J. M. W. Turner and Thomas Moran” at the New York Public Library, New York. Through February 15.

The prints in question were mostly etchings and engravings. These techniques are not widely understood by the general public, but it helps to know a bit about them in order to appreciate the intricacy and finesse of the art on display.

An engraving uses a tool, called a… More…