a musical instrument, composed of a tube with one end available together with various other end covered with a thin versatile membrane layer with a mirror attached with its center, utilized for exhibiting upon a screen, by way of rays reflected through the mirror, the vibratory movements due to noises that enter the pipe.
An instrument, composed of a tube having one end available in addition to various other end covered with a thin versatile membrance towards the center of which is attached a little mirror. It's utilized for exhibiting upon a screen, in the form of rays reflected through the mirror, the vibratory movements brought on by noises created in the open end associated with the pipe, as by talking or singing into it.
An instrument for illustrating noise in the form of light.
A theory or system of social reform which contemplates a complete reconstruction of society with a more just and equitable distribution of property and labor In popular usage the term is often employed to indicate any lawless revolutionary social scheme See Communism Fourierism Saint Simonianism forms of socialism...