\ 
578  Book  Reviews.  ■[ 
(   December,  1911. 
Allen's  Commercial  Organic  Analysis  "  in  his  laboratory.  These 
words  are  not  necessary  to  those  who  used  these  books  for  reference 
during  their  days  at  college  or  in  the  university.  Books  of  this 
character  should  be  on  hand  for  immediate  use  when  necessity 
arises.  It  is  from  the  wise  use  of  books  that  mortars  and  graduates 
become  successful  instruments  in  the  solution  of  the  perplexing 
problems  that  arise  behind  the  prescription  counter  or  in  the  labora- 
tory. 
An  Introduction  to  Vegetable  Physiology.  By  J.  Reynolds 
(jreen.  Fellow  and  Lecturer  of  Downing  College,  Cambridge. 
Third  edition.  Philadelphia:  P.  Blakiston's  Sons  &  Co.,  1012  Wal- 
nut Street.    $3.00  net. 
The  first  edition  of  Green's  Physiology  was  published  in  June. 
1900.  The  author's  treatment  of  the  subject  was  so  happy  and  his 
style  so  clear,  that  in  spite  of  the  fact  that  there  are  several  good 
books  on  plant  physiology  written  by  teachers  in  the  United  States, 
the  work  has  been  quite  largely  used  here.  Professor  Green  was 
at  one  time  professor  of  botany  to  the  Pharmaceutical  Society  of 
Great  Britain,  and  is  well  knowm  for  his  researches  in  plant  physi- 
ology. In  fact,  many  of  his  articles  have  been  printed  in  the 
Pharmaceutical  Journal  of  London  and  extensively  reprinted  in 
the  drug  journals  of  the  Lnited  States. 
Those  of  us  who  have  used  the  volumes  of  the  earlier  editions 
are  gratified  to  find  that  in  the  third  edition  we  have  in  many  par- 
ticulars essentially  a  new  book.  The  correlation  of  the  internal 
structure  of  plants  with  their  physiological  needs  is  emphasized 
in  the  light  of  more  recent  morphological  studies.  Professor 
Green  combats  the  idea  expressed  in  certain  quarters  during  the 
past  few  years,  that  many  changes  may  go  on  in  the  protoplasm 
without  involving  any  interchange  of  its  substance.  He  holds  this  to 
be  erroneous,  for  in  all  the  reactions  in  which  the  protoplasm  is 
concerned  its  own  auto-decomposition  and  reconstruction  are  in- 
volved. 
The  book  contains  nearly  200  illustrations,  mostly  dealing  with 
the  inner  structure  of  plants.  The  whole  subject  is  one  of  such 
great  interest  and  importance  and  the  treatment  is  so  admirable  in 
Professor  Green's  book  that  students  in  pharmacy,  as  well  as  others, 
might  well  be  encouraged  to  use  it. 
