761 



sounds pronounced separately were recorded by means of an 

 Edison phonograph (old type) 



The difference between the sounds as recorded by the phonograph 

 can be made much more illustrative and easily measurable by 



0^0 <>?>!: ? 



y . 



L (i^<\-^->^ 



^I A.AaX AJO-lA-X 



o (^ a Ó Ö o 



\ •^^^J^ 



-ii^^/A a^-^w J. :i t „^ 





Fig. 7. 

 transforming the indentations of the wax cylinder into a curve on 

 smoked paper. This is done by the apparatus constructed for this 

 purpose by Liohet. A sapphire follows the groove of the phonographic 

 cylinder; the movements made by the sapphire in doing so are 

 transferred to a writing-lever, recording them on a rotating cylinder. 

 As there is no such apparatus in Holland, as far as 1 know, also 

 this part of the investigation was made at Prague under the guidance 

 of Prof. Chlumsky. The words ,, bod" and ,, bot" were again recorded 

 phonographically, making use of the apparatus of Lioret. By means 



