undisturbed. The bright sunlight, relative stability of climate, and varied terrain
             found in California made it an ideal place to film, much of the reason for the
             industry's concentration there. During this time, films were shot on a single
             reel, resulting in filmstrips that were only 15-20 minutes. Independent
             producers pioneered the use of double reel filmmaking during the years
             before the First World War. This allowed much longer films and opening the
             door for further opportunity, both financially and creatively, as well as
             bringing into being the double reel camera that became such an icon of movie
             production. The major advance of the 1930's was the introduction of
             synchronous sound and dialogue in the late 1930's. First invented and shown
             in the 1920's, it became the standard by the early 1930's, partly due to the
             invention of a device based on the radio that could effectively amplify sound
             in the theater. Initially there were two available systems with which to record
             sound. The first was similar to a phonograph, and recorded the sound to a
             separate disc. The second, more popular, system recorded the sound directly
             onto the celluloid strip. Initially sound hindered the filmmaking process, since
             the cameras had to be encased to muffle the noise of their motors and actors
             could not stray far from the stationary microphones. However, technological
             advances soon made up for this and the sound became an integral part of
             filmmaking. The incorporation of sound into film and the resulting movie
             theater dr...