26. Who was Henry Barth, and what did he do?
27. What do we owe to John Marder?
28. What do we owe to L. R. Benton?
29. What invention followed the work of Benton and Werner, and why?
30. What need became acute in composing room, and what was done to meet it?
31. What invention changed the course of development along this line?
32. Tell the story of Ottmar Mergenthaler.
33. What did Tolbert Lanston invent?
34. Tell the story of the discovery of the electrotyping process.
35. Who was the first to apply this process to printing, and what were the defects of his method?