Am.  Jour.  Puarm.  i 
November,  1906.  J 
Book  Reviews. 
547 
carbides,  etc.  A  number  of  tables  have  been  added  which  will 
add  greatly  to  the  value  of  the  book  for  reference  by  the  analyst, 
as  those  on  critical  temperature  and  pressure,  boiling  point  of  water 
under  various  pressures,  etc. 
The  chemistry  of  the  organic  compounds  has  been  carefully  re. 
vised  and  has  been  enlarged  by  the  addition  of  a  number  of  new 
synthetic  compounds  which  are  used  in  medicine  and  the  arts.  This 
part  of  the  book  has  always  been  considered  to  be  the  most  valuable 
from  a  didactic  point  of  view.  The  treatment  is  clear-cut  and  the 
definitions  are  capable  of  comparison  so  that  the  student  is  never 
left  in  the  dark  as  to  the  meaning  of  a  name  or  the  definition  of  a 
substance  and  how  it  differs  from  some  closely  related  term  or  sub. 
stance.  Some  changes  have  been  made  in  the  classifications,  so  that 
the  whole  consideration  is  from  the  point  of  view  of  the  best  authori- 
ties in  organic  chemistry.  The  care  with  which  the  revision  of  this 
part  of  the  book  has  been  carried  on  is  best  seen  in  the  consid- 
eration of  the  alkaloids  theobromine  and  caffeine,  in  the  light  of 
Fischer's  recent  work  on  uric  acid ;  the  incorporation  of  the  recent 
work  on  isocyclic  compounds  and  their  derivatives ;  the  chemistry 
of  tissue-forming  substances.  This  part  of  the  book  is  remarkably 
free  from  the  mistakes  in  botanical  nomenclature  which  are  so  fre- 
quent in  books  on  chemistry. 
So  long  as  this  text-book  by  Sadtler  and  Coblentz  is  revised,  as 
has  been  the  fourth  edition,  it  will  continue  to  hold  a  very  prominent 
place  as  a  text-book  for  students  in  pharmacy  and  medicine  and  will 
be  found  a  very  valuable  reference  book  by  every  one  who  requires 
to  consult  a  work  on  chemistry. 
The  illustrations,  printing,  binding  and  whole  appearance  of  the 
book  are  in  keeping  with  the  work  of  the  authors  on  the  contents, 
and  both  authors  and  publishers  are  to  be  congratulated  on  getting 
out  such  a  satisfactory  book.  The  book  comprises  760  pages  and 
can  be  had  for  $3.50  in  cloth  binding  and  for  $4.00  in  sheep  binding. 
