Am.  Jour.  Pharm.  ) 
September,  1920.  ) 
Book  Reviews. 
685 
bacterial  counts,  staining  solutions,  and  methods  for  examining 
bacteria. 
Chapter  VII,  a  newly  added  chapter,  gives  detailed  information 
regarding  the  biological  relationships  of  bacteria  with  a  general 
introduction  to  the  phenomena  of  Symbiosis.  This  chapter  is  very 
interesting  and  of  considerable  value  to  bacteriologists  and  advanced 
students,  but  the  average  pharmacist  would  have  little  use  for  this 
information. 
Chapter  VIII  treats  more  fully  (than  the  corresponding  chap- 
ter in  the  previous  edition)  of  bacteria  found  in  industries.  The 
information  treats  of  the  function  of  bacteria  in  agriculture,  to- 
gether with  interesting  data  relating  to  the  bacteria  and  methods 
of  examining  bacteria  in  milk,  in  the  dairy  industry,  in  water 
supplies,  in  the  tanning  industry,  in  cider  making,  and  bacterial 
pest  exterminators. 
Chapter  IX  is  a  newly  added  chapter  on  ferments  and  fermenta- 
tion. 
Chapter  X,  on  immunity  and  immunizing  agents,  has  been  en- 
larged. 
The  manufacture  and  use  of  sera  and  vaccines  and  other  bio- 
logical products  are  found  in  Chapter  XI. 
Adenology,  the  science  which  treats  of  glands,  is  contained  in 
Chapter  XII,  together  with  methods  for  the  preservations  and 
storage  of  biological  products.  Adenology,  though  of  value  to  the 
pharmacist,  due  to  his  interest  in  glandular  extracts,  is  not  a  bac- 
teriological topic,  even  though  recent  investigations  have  demon- 
strated that  the  activity  of  the  glands  are  directly  connected  with 
the  process  of  immunization. 
Chapter  XIII  gives  extensive  information  relating  to  yeasts 
and  moulds. 
In  Chapter  XIV  is  found  data  relating  to  protozoa  in  disease. 
Here  is  another  chapter  dealing  with  information  other  than  bac- 
teriology. The  data  given  is  brief  and  incomplete.  Mention 
should  be  made  in  the  preface  that  Chapters  XI  and  XIII  contain 
information  of  importance  to  pharmacists  and  only  indirectly  re- 
lated to  bacteriology. 
Chapter  XV,  on  disinfectants  and  disinfection,  food  preserva- 
tion and  insecticides,  is  incomplete.  There  is  very  little  that  has 
been  added  to  the  identical  chapter  of  edition  I,  published  in  1912, 
though  considerable  new  materials  and  information  on  these  topics 
