148 
Book  Reviezvs. 
I  Am.  Jour.  Pharm. 
*•    February,  19 18. 
prove  a  great  aid  to  the  student  by  presenting  a  comprehensive 
scheme  for  facilitating  the  acquiring  of  the  knowledge.  The  ques- 
tions following  each  chapter  will  likewise  prove  beneficial  by  en- 
abling him  to  determine  at  once  what  part  of  the  content  of  the 
chapter  he  has  failed  to  acquire. 
The  book  is  exceptionally  free  from  typographical  errors  and  a 
critical  examination  reveals  but  very  few  statements  of  facts  to 
which  one  can  take  exception.  There  are,  however,  a  few  "  slips  " 
to  which  attention  should  be  called.  For  example  on  page  1,051, 
Spiritus  Frumenti  is  designated  as  "  U.  S.,"  although  the  author 
was  well  aware  that  whisky  had  been  deleted  from  the  pharma- 
copoeia. In  this  connection  we  likewise  note  that  the  tests  of  the 
U.  S.  P.  VIII  are  given  despite  the  fact  that  their  reliability  was 
questioned  and  improvements  published. 
The  author  was  such  an  expert  in  explaining  to  his  classes  the 
various  processes  of  percolation  that  we  are  disappointed  in  noting 
the  scant  consideration  that  is  given  to  the  process  of  "  Fractional 
Percolation"  as  proposed  by  the  late  Professor  C.  Lewis  Diehl  and 
the  modification  of  this  excellent  process  adopted  in  the  U.  S.  P. 
IX  and  to  the  differentiation  between  this  and  "  Repercolation." 
Oldberg  is,  likewise,  given  credit  for  a  style  of  percolator  which 
was  described  much  earlier  by  Diehl. 
On  page  125 1,  in  discussing  Sapo  Mollis  U.  S.  P.  IX,  the  author 
states :  "  The  new  soap  is  light  yelow  in  color  and  the  usual  synonym 
'  Green  Soap  '  cannot,  therefore,  be  properly  applied."  Nevertheless 
in  the  same  article  on  the  same  page  we  are  told  under  "  Uses : 
Green  soap  is  used  in  skin  diseases." 
Although  the  author  repeats  in  his  work  the  "  Type  Processes  " 
for  Fluidextracts  and  Tinctures  as  adopted  by  the  U.  S.  P.  IX  in 
order  to  save  useless  repetition  and  waste  of  space,  he  prints  in  each 
formula  full  directions,  following  the  style  of  the  U.  S.  P.  VIII. 
The  reason  for  this  is  not  apparent,  unless  it  was  deemed  desirable 
to  do  so  because  of  the  plan  adopted  throughout  the  entire  volume 
of  giving  in  each  formula  alternative  quantities,  the  official  formulas 
being  designated  as  "  Metric "  and  the  transpositions  in  Apoth- 
ecaries' Weight  and  Measure  as  "  Old  Form." 
Any  one  who  has  attempted  to  classify  drugs  in  accordance  with 
their  constituents  will  recognize  the  peculiar  difficulties  and  prob- 
lems that  arise.    The  attempt  to  include  in  this  work  all  of  the 
