Am.  Jour,  Pharm.  | 
July,  1915.  J 
Book  Reviews. 
323 
which  no  minute  globules  of  oil  are  present,  but  all  is  in  uniform 
solution. 
To  summarize,  a  high  coefficient  disinfectant  of  the  third  group 
is  less  likely  to  be  destroyed  or  inhibited  in  its  action  and  is  more 
generally  applicable  than  the  gaseous  disinfectants,  the  oxidizing  and 
reducing  agents,  or  the  toxic  and  protein-coagulating  agents. 
When  diluted  to  make  a  solution  equivalent  to  a  three  or  five  per 
cent,  solution  of  phenol,  it  is 
Non-toxic, 
Non-corrosive  to  metals, 
Non-coagulative  to  tissues, 
Not  caustic  to  the  skin, 
Not  affected  by  alkalies, 
Not  destroyed  by  acids, 
Not  oxidized  nor  reduced  by  organic  matter. 
An  efficient  germicide. 
At  minimum  cost  per  unit  of  efficiency. 
It  is  not  merely  a  substitute  for  carbolic  acid ;  it  is  a  new  material 
possessing  not  only  all  the  advantages  of  this  valuable  substance,  but 
many  others  in  addition.  Why  should  the  physician  or  the  surgeon 
continue  to  use  carbolic  acid  ? 
Research  Laboratory, 
Parke,  Davis  &  Co. 
BOOK  REVIEWS. 
Erstes  Mikroskopisches  Praktikum.    Eine  Einfuhrung  in  den 
Gebrauch  des  Mikroskopes  und  in  die  Anatomie-  der  hoheren 
Pflanzen.  Von  Dr.  Arthur  Meyer,  Universitat  Marburg.   Jena : 
Gustav  Fischer,  191 5. 
This  is  the  third  edition  of '.Meyer's  "  Praktikum,"  which  has  come 
to  be  recognized  as  of  fundamental  importance  to  the  student  in  the 
study  of  the  anatomy  of  higher  plants.    There  is  very  apt  to  be  a 
somewhat  superficial  consideration  given  in  most  courses  in  botany 
on  the  basic  principles  concerning  the  use  of  the  microscope.   In  this 
particular  Meyer's  work  is  unique,  and  at  the  outset  gives  the  student 
many  illustrations,  so  that  he  becomes  thoroughly  grounded  in  the 
correct  interpretation  of  the  objects  which  he  is  viewing  under  the 
microscope.    Likewise  in  the  use  of  reagents,  the  microtome,  and 
staining  technique  there  is  considerable  detail  which  is  of  value  to  the 
