747 



CO 



t'ereiu-es between the two o-sonnds. These results 

 harmonize quite well with those obtained by 

 Eykman ') who, working with the same instrument, 

 found an average jaw opening of 7,25 mM for a 



Fig. 2. 



in "bat", 5,50 niiM for o of "pot", 4,75 mM for 

 00 of "boot", 4,50 n)M for o of "bot" and 2,25 

 for oe of "boet". 



Fig. 5 also shows curves of lip, jaw, and mouth 

 bottom, but these curves are obtained in anotiier 

 way, viz. by means of a "month-funnel" that per- 

 mits of registering the above mentioned movements 

 at the same time. This instrument, constructed 

 by me for another purpose, will be dealt with 

 elsewhere. As it has no fixed support, it misses 

 the exactness which characterizes Zwaardemakeh's 

 apparatus. Still it is very useful to give a provi- 

 sional impression of something relative. It can be 

 noticed in fig. 5 that in pronouncing "dorscht" 

 there is less pouting of the lips and a larger jaw 

 opening tlian for ,, dorst", while the curve of the 

 mouth bottom is almost the same for botii words. 

 From the mouth-funnel curve it appears that the 

 air current for o is stronger than for o, as is 

 easily comprehensible. From the above, therefore, 

 it becomes evident again that the two sounds differ 

 considerably. 



•) Onderz. Physiol. Lab. te Utrecht Ve reeks II 1899— 1901 

 p. 202 



