Motion  seconded  and  prevailed.
Report  of  Committee  on  Indicators.*
Mr,  Chairman,  and  Members  of  the  Association  :

The  third  report  of  the  Committee  consists  of  some  results  obtained  by  two  of  the
workers  who  were  dissatisfied  with  some  of  their  data  in  last  year's  report.  Prof.  J.  U.
lioyd,  and  the  Chairman,  after  comparing  their  results  reported  at  the  Montreal  meet-
ing, decided  to  repeat  the  work  for  coca  leaf  and  its  fluid  extract.  This,  it  was  con-
cluded, should  be  done  on  about  the  same  date  and  in  the  same  manner.  The  Chairman
prepared  the  material,  and  forwarded  it  with  instructions.
Fluid  Extract  of  Coca  Leaf.
For  assaying  this  preparation,  the  directions  of  the  Chairman  of  the  Committee  as  re-
ported in  the  Proceedings  for  1896  were  adhered  to,  employing,  however,  enough  of  the
fluid  extract  to  make  six  or  seven  determinations  from  the  same  extraction,  so  that  there
would  be  no  source  of  error  here.  Titrations  were  executed  only  with  chlorophyll-free
(nearly)  alkaloids,  using  the  most  satisfactory  indicators,  viz :  Brazil  wood,  cochineal
and  haematoxylin.
The  results  reported  by  Lloyd  and  Kebler  last  year  on  fluid  extract  of  coca  were  as
follows  :

Lloyd.  Kebler.
Gravimetric.        Volumetric.      Gravimetric.        Volumetric.
Brazil  Wood 0.48  0.34  0.53  0.35

Cochineal 0.57  0.29  0.55  040

Hsematoxylin 0.53  0.27  0.54  0.38

Lacmoid 0.60  0.35  0.50  0.38

While  aU  their  other  results  agreed  quite  closely,  this  portion  was  considered  unsatis-
factory.
On  assaying  the  second  fluid  extract,  November  7th,  the  results  were  as  follows :

Lloyd.  Kebler.
Usug  Alcohol.         Excluding  Alcohol.  Using  Alcohol.
Grav.  Vol.  Grav.  Vol.  Gravimeiric.  Volumetric.
