Complex sentence: Early celluloid filmstrips had a habit of melting or combusting from the intense and sustained heat of the projection lamp.these were called Pictural Filmstrips the First Filmstrips that were produced in a Complete set.
Split into simpler sentences: Early celluloid filmstrips had a habit of melting or combusting from the intense and sustained heat of the projection lamp. These were called Pictural Filmstrips the First Filmstrips that were produced in a Complete set.