21. Martel was a skilled typographer with an eye for the expressive nuances of type. 22. While Burt invented the typographer , he is better known for his solar compass. 23. Zwart classified him as a'typotect'; part typographer , part architect. 24. There are four different decisions a typographer can make that affect the type color. 25. He became a typographer and a union activist. 26. A builders union emerged in 1834, followed by a typographers union shortly thereafter. 27. Manoptica was developed between 1937 and 1987 by graphic designer and typographer Manop Srisomporn. 28. There are not many well-known typographers . 29. In his books, he acted as his own scenic and costume designer and typographer . 30. Typographer Robert Bringhurst referred to the codex as a " subtle piece of craftsmanship ".