Sentence:  In wood engraving every line is forced along its direction, and the very awkwardness of the operation ultimately gives an authority to the printed line. In <WSD>acrography</WSD> this was not so. 
Meaning of the word marked with <WSD> tags:  A method of relief etching on wood, metal, or stone by means of a coating of compressed chalk, invented by Louis Schonberg in 1841.