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Otago Daily Times, Issue 18752, 4 January 1923, Page 7

\ new instrument which will analyse. ' anv kind of sound has been made. It WIJI ' show you what the noise of a hammer blo*r looks like-on papor-or will .show up a fault in the geann? of a machine, ct < V it registers graphically the things one listens £ for and will show the slightest variation thn air pressure caused by the waves due to i sound. It is portable and simple and con. *,, Lots of nothing more than a «Irered dia- - ; phragm fixed at the end of a horn. If °oe- .<• sings or whistles into the horn the dm- .-, phrac.-n vibrates and its movements cause *, .?■; boncfl of light, focused upon a piece of kme. .-■ ffiUVh film ««\ ched *? drum to trace out the motion of a ngMff. nath Much can be learned as to the nature . 01 quality of the sound by the shape of thw ' curve, and the number of vibrations ■..■; per second can be easuy counted by means ; ; of a regular curve traced at the o| . the film bv a second spot of light «fl«*eoV' W > from a tuning fork, the movements of which arc of course, always the same in number nTr second. Photographing sound waves 2d vibration, is not in Itself a new achieve. ment but the new instrument makes its abearance us a practical testujg instrument, and physicists.-Da.ly Mail. Quit that cold! "NAZOL" inhaled or,_ taken on sugar does the trick in double, quick time. Is 6d for 60 doses. Chemists and stores. —Advt. "The Masque of Alfred." a play produced in 1740 is only noteworthy because it contained the lyric, "Rule, Britannia!" Probably the longest village in the world!, J. ia Kempton, near Bradford. It straggles along a single road for seven miles. It takes lgal of milk to make lib o! ' cheese, -2