18^.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 731 



Fkame 144. — Tlie Woodbury type. — The Woodbury-type is in so far an 

 intaglio process as the color is taken up by the paper from depressions 

 in the printing form, but this form is a block of metal into which the 

 hardened gelatine film has been pressed, and the ink is coloring-matter 

 suspended in a transparent solution of gelatine. The process is often 

 spoken of as a relief process, owing to -the fact that the heavy lines and 

 dark shadows of the picture stand out in relief from the paper. But 

 the designation is misleading, as in all other cases the relief processes 

 are understood to be those which produce blocks for the type press. 

 No. 969, from an engraving ; Nos. 971-973, from nature ; by the %Yood- 

 bury Permanent Photographic Printing Company, London. No. 970, 

 from nature ; by the London Stereoscopic and Photographic Company. 

 Nos. 974-979, " Proc^d6 Photoglyptique " of P. Patin, Paris. 



