Indian Education

The reader may be aware of the manner in which continuous records are taken of the variations in the height of a barometer by means of a pencil and a drum of paper made to revolve by clock-work. [...] When we talk of the path of a particle of air set in motion by a vibration we conceive of a similar record shoing the movement of the particle in relation to time above and below a horizontal line which represents the position of the particle when at rest. [...] 61 partial for instance which is strong in some pianos is not to be obtained if the instrument is in tune as the tempered b I string is too sharp to be excited by the vibrations of the harmonic seventh of c. If we realize that the frame of the pianoforte with its strings gives a very imperfect representation of the marvellous mechanism of parts of the cochlea the opinion now generally accep [...] It will be observed that the upper scale is not the same as the scale from A to A in C Major ; the difference lies in the fourth (F in the one case and Din the other ). The common notion that A to A in the just C major scale gives the melodic descending form of the minor is a fallacy due to the prevailing ignorance of the dual character of the note D. To form the A minor scale 'low D' must be use [...] Occasionally as in the Norwegian final cadence F A C' C G C' EV A is treated as part of the chord of F ; the powerful effect of the cadence is due to the fact that the chord F A C' is a foreign chord.