OCR Text |
Show "the'colur of "sound. How tlio Touo of it Trutupot laUutno! Hie Drain. ' Wo rccognlzo tho happiness of tho well-known analogy traced by n blind man between scarlet nnd tho sound of a trumpet, .becnuso those who can both seo and hear accept tho aptness of comparison com-parison between tho two forces which pott erf ully affect, ono tho optlo, tho other tho auditory, nerves. Hut scarlet U not tho exact uuuloguo of a trumpet blant. Tho bcnsatlon of color Is Imparted to tho brain by means of vibratory ttnvcs communicated to tho nll-porvadluK medium, me-dium, other, that of sound by similar waves communicated to tho denser medium, me-dium, atmosphere. If tho nnnloguo between be-tween scarlet and a trumpet blast wcro a true ono each should ulTcct tho tentorium tento-rium by means of vibration of a rapidity rapid-ity similar In proportion to that caused by other colors and tones. Hut that Is not so, says Blackwood's Magazlno. Tho pitch of a tono Increases In-creases with tho number of vibrations in a (riven tlmoj tho tono of a trumpet U high because It causes relatively rapid Bouud waves. Hut tho vibrations caused by n ray of red Hjtht aro few compared with those caused by other rnys, for tho vlbrationn arising from tho red end of tho spectrum amount only to about four hundred and Uf ty-slx billions In a second, whereas thofcq from tho vlolot end amount to about six hundred and slxty-tcvcD billions. 80 tho Wind man was only vaguely successful In comparing compar-ing a Uvolt' sound with a vivid color. |