The planning and construction of American theatres (1903)
Birkmire, Wm. H. (William Harvey), 1860-1924 · New York : J. Wiley · leaf 182
he voice (refer to the plan Fig. i), according as the actor's face shall be turned more or less toward either of the sides of the theatre, the utmost distance from the front of the stage to the rear ought not to exceed 75 feet, or the limit the voice is capable of expanding in a lateral direction.… … Fig. I. — Plan. were to be considered as invariably the direct line of the voice, and were accordingly to be extended 92 feet — the expansion of the voice in a direct line — the consequence would be that upon a sudden turn of the actor's head what had before been the direct line of the sound would…
Theater architecture
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
