Update README.md

README.md

@@ -159,7 +159,7 @@ As there is no consensus definition of the chapbook even among domain specialist
 
 ### Other Known Limitations
 
-Within this dataset, illustrations are repeatedly reused to an unusually high degree compared to other printed illustrations: the positioning of illustrations on the page and the size and format of chapbooks as a whole is also characteristic of the chapbook format in particular. The extent to which these annotations may be generalised to other printed works is under evaluation: initial results have been promising for other letterpress illustrations surrounded by texts. 
+Within this dataset, illustrations are repeatedly reused to an unusually high degree compared to other printed forms. The positioning of illustrations on the page and the size and format of chapbooks as a whole is also characteristic of the chapbook format in particular. The extent to which these annotations may be generalised to other printed works is under evaluation: initial results have been promising for other letterpress illustrations surrounded by texts. 
 
 ## Additional Information