NEW  SYSTEM   OF   INDO-EUROPEAN  PHONETICS.  IX

'  The  writers  of  the  new  school  treat  the  vowel-phenomena
in  *  reihen,'  '  vocalreihen,'  an  expression  which,  like  many  Ger-
man grammatical  terms,  can  be  rendered  but  inadequately
into  English  by  'vowel  series.'  Parallel  with  the  three  vocalic
forms  presented  in  the  a^-reihe  (form  with  a",  form  with  a°,
and  form  without  this  a^'-a'')  there  appear  three  other  series
— the  ^-series :  e,  o,  e,  the  a-series :  a,  o,  d,  and  the  o-series :
0,  0,  dj  justifying  the  following  proportion  for  the  Greek :

TABLE  I.
€-series :  c  :  o  :  ~  =

77-series :  rj  :  0)  :  €  =

d-series :  d  :  cd  :  a  =

o)-series :  w  :  w  :  o

An  example  of  the  17-series  is  presented  by :  rt-Orf-fit,  Bay-fio-gy
TL-Oe-fjiaL ;  of  the  d-series  by  ^rj-ixi,  cfxD'in],  ^a-/xeV  ;  of  the  w-series
by  Si-8(D'fJii,  Se-Sco-Ka,  So-Tos.
