48  Reviews  and  Bibliographical  Notices.  {A™^S!Jyfig£m* 
poeia,  and  have  expressed  this  in  a  brief  commentary  which  the 
readers  and  users  of  the  Pharmacopoeia  will  find  useful. 
The  vegetable  and  animal  drugs,  as  well  as  chemicals,  are  treated 
under  the  following  headings :  A  general  description  as  to  origin 
and  occurrence  of  the  substance ;  physical  and  chemical  characters ; 
notes  or  comments.  The  various  preparations  are  considered  under 
their  respective  groups,  and  a  "running"  commentary  is  made  of 
each.  One  of  the  values  of  the  work  is  that  it  does  not  take  the 
place  of  the  British  Pharmacopoeia  but  it  supplements  it  in  a  manner 
that  is  commendable  to  the  authors  and  will  be  beneficial  to  the 
interests  of  that  Pharmacopoeia.  Authors  of  text-books,  students, 
physicians,  and  pharmacists  will  find  it  profitable  to  have  the  book. 
A  Manual  of  Volumetric  Analysis.  Treating  on  the  subjects 
of  Indicators,  Test-Papers,  Alkalimetry,  Acidimetry,  Analysis  by 
Oxidation  and  Reduction,  Iodometry,  Assay  Processes  for  Drugs 
with  the  Titrimetric  Estimation  of  Alkaloids,  Estimation  of  Phenol, 
Sugar ;  Tables  of  Atomic  and  Molecular  Weights.  By  Virgil 
Coblentz.  Illustrated.  Philadelphia :  P.  Blakiston's  Son  &  Co., 
10 1 2  Walnut  Street,  190 1.    Octavo,  180  pages.    Price,  $1.25  net. 
This  manual  is  an  elucidation  of  the  principles  underlying  and 
connected  with  the  subjects  relating  to  volumetric  analysis.  The 
author  is  perfectly  familiar  with  the  modern  theories  in  physical 
chemistry  and  has  applied  this  knowledge  in  the  treatment  of  the 
subject  of  indicators.  The  disturbing  elements  in  titration,  such  as 
dilution,  temperature,  etc.,  are  carefully  considered.  The  fact  that 
standard  solutions  require  to  be  re-standardized,  and  that  it  is  very 
convenient  to  prepare  these  empirical  solutions  when  needed,  has 
led  the  author  to  devote  a  special  section  to  this  subject,  practical 
examples  being  given  throughout  the  text. 
The  following  subjects  are  treated :  I.  Definitions,  Apparatus, 
Standard  Solutions.  11.  Analysis  by  Saturation:  Indicators,  Test- 
Papers,  Preparation  of  Standard  Acid  and  Alkali  Solutions,  Alka- 
limetry, Acidimetry,  Direct  Percentage  Estimations,  Empirical  Solu- 
tions in  Titrating,  Volumetric  Estimations  of  Alkaloids.  III. 
Analysis  by  Oxidation  and  Reduction:  Estimations  with  Potassium 
Permanganate,  Direct  Methods  of  Estimation,  Indirect  Methods  of 
Estimation,  Estimations  with  Potassium  Dichromate,  Determina- 
tions involving  Iodine  and  Sodium  Thiosulphate  V.S.,  Estimation 
