A London encyclopaedia, or universal dictionary of science, art, literature and practical mechanics : comprising a popular view of the present state of knowledge : illustrated by numerous engravings, a general atlas, and appropriate diagrams (1829)
Curtis, Thomas, fl. 1820 · London : Thomas Tegg · leaf 60
printed, andthe whole labor of the artist is lost. It happens,however, that some stones have small black veins,like hair lines, which run across them, as well asother little imperfections. The artist ought,therefore, always to take these defects (if exist-ing) into consideration, when he puts his… … L I T II O G R A P II Y. 49 tl.e stone, lie may place these so that t^ie veinsshall come between them, as in this case theyare of little consequence : or else, if tne stone islarge enough to allow it, there is no absolutenecessity to place the drawing in the middle ;but it may be made on one side…
Encyclopedias and dictionaries · Aeronautics
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