710 CATALOGUE OF GRAPHIC ART EXHIBIT. 



Frame 18. — German etchings^ eighttenth and nineteenth centuries. — No. 

 86, G. F. Schniidt (1712-1775), his own portrait. No. 87, Rudolf Alt. 

 No. 88, Carl Piloty. No. 89, William Leibl. All these original etchings. 

 Nos. 90, William Hecht, and 91, William Unger, reproductive etchings. 



Frame 19. — Modern French etchings; original. — No. 92, Eugene Del- 

 acroix (1799-18G3). No. 93, Charles Jacque. No. 94, Maxime Lalanne. 

 No. 95, F. Chifflart. No. 96, F. Bracquemond. No. 97, Jules Jacque- 

 mart. 



Frame 20, — Modern French etchings ; reproductive. — Nos. 98 and 99, 

 Leopold Flameng. No. 100, Paul Kajou. No. 101, C. xV. Waltner. No. 

 102, Theodore Chauvel. 



4. MEZZOTINT. 



Mezzotint reverses the order of most other kinds of engraving in this, 

 that it works from dark into light. Before the actual artistic work of 

 the engraver begins, the plate is worked all over its surface with a 

 toothed instrument, called the rocker, thus breaking it up into an in- 

 finite number of microscopically small cavities, which hold the ink. An 

 impression from the plate in this state would present a uniform velvety 

 blackness. By careful scraping with a steel knife or scraper, gradations 

 from dark to light can be produced, the action of the scraper re- 

 ducing tbe depth of the cavities and broadening the walls between 

 them. Perfect whites result from complete erasure of the cavities 

 and polishing the smooth places thus produced upon the plate. 31ez- 

 zotiut is used alone or in combination with etching, graver work, stip- 

 pling, etc. 



This process was invented by an amateur, Ludwig von Siegen, whose 

 earliest published plate is dated 1642. By him it was communicated to 

 Prince Rupert, who introduced it into England, and who is often called 

 its inventor. 



Frame 21.— Early Period. — England, eighteenth centitry.—^o. 104, 

 Wallerant Vaillant (1632-1677). No. 105, Richard Earlom (1728-1822?). 

 Nos. 106 and 107, Valentine Green (1739-1813). 



Frame 22. — England, eighteenth century. — Nos. 108 and 109, Richard 

 Earlom. 



Frame 23. — England and America, nineteentli century. — No. 110, John 

 Sartain, Philadelphia. No. Ill, Richard Josey. 



Frame 24. — America, nineteenth century. — Nos. 112-116, original mez- 

 zotints by Charles H. Moore, Cambridge, Mass. 



