A screen split often on the diagonal was regularly used for phone

Rouben Mamoulian's 1932 Dr. Jekyll and Mr. Hyde repeatedly used a
diagonal wipe which paused halfway in its progress across the screen
to achieve a momentary split screen effect and increase the visual
associations between two succeeding shots.

--Richard J. Leskosky

Richard J. Leskosky                             Office phone: (217) 244-2704
Assistant Director                      FAX: (217) 244-4019
Unit for Cinema Studies         <http://www.uiuc.edu/unit/cinema>
University of Illinois at Urbana-Champaign
3035 Foreign Languages Building
707 S. Mathews Avenue
Urbana, Illinois 61801

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