It  is  a  tact,  which  we  can  verify  from  extensive


686


EXTRACT


experience  in  the  laboratory,  and  from  years
of  practical  observation  on  this  point,  that
extracts  faithfully  prepared  from  good  ma-
terials do  not  possess  the  sightly  and  pleasing
appearance  of  those  commonly  yended  by  the
wholesale  druggists.  On  comparing  the  ex-
tracts prepared  by  different  metropolitan
houses,  we  have  found  that  those  which  have
exhibited  a  remarkably  bright  and  glossy  ap-
pearance have  been  uniformly  inferior,  and
sometimes  nearly  inert ;  whilst  others,  with  a
less  prepossessing  appearance,  have  been  gene-
rally of  good  quality.  These  facts  are  well  es-
tablished by  reference  to  the  extracts  of  those
houses  and  institutions  that  are  remarkable
for  the  superior  quality  of  their  preparations,
and  by  comparing  them  with  the  common
extracts  of  the  shops  supplied  by  the  whole-
sale trade.
