Am,Mayj904arm'}      Reviews  and  Bibliographical  Notices.  229 
significance.  This  system  of  classification  is  an  excellent  one,  and 
as  it  has  been  in  use  in  the  natural  sciences  for  many  years  with 
excellent  results,  so  far  as  the  determination  of  animals  and  plants 
is  concerned,  is  probably  the  only  satisfactory  way  of  looking  at 
chemicals  with  the  end  in  view  of  finally  determining  an  unknown 
organic  compound.  The  work  will  not  only  appeal  to  chemists,  but 
botanists  and  zoologists  as  well,  as  the  evolution  of  organic  com- 
pounds in  nature  is  very  likely  in  the  near  future  to  demand  consid- 
erable attention  from  students  of  these  branches  of  natural  science. 
In  order  to  give  our  readers  a  better  idea  of  the  nature  of  the 
book,  we  give  a  rather  comprehensive  view  of  the  contents,  as 
follows : 
Chapter  I :  Classification  of  compounds  and  the  analytical  pro- 
cedure, including  explanation  of  classification,  orders,  genera,  divis- 
ions, sections,  species ;  general  directions  for  examination  of 
unknown  compounds — evidences  of  homogeneity  ;  examinations  of 
physical  characteristics  ;  determination  of  order ;  determination  of 
genus  ;  tabular  summary  of  generic  tests  ;  determination  of  division 
and  section;  determination  of  species.  Chapter  II :  Ordinal  tests, 
including  procedure  for  detection  of  the  elements  in  organic  com- 
pounds, as  carbon  and  ash  constituents ;  sulphur,  nitrogen  and  the 
halogens ;  ignition  with  sodium  ;  sulphur  ;  nitrogen  ;  nitrogen  and 
sulphur  together  ;  phosphorus  ;  halogens  ;  iodine  ;  bromine  ;  chlo- 
rine. Chapter  III :  Genus  I  (Subord.  I,  Ord.  I). —  Aldehydes,  giving 
generic  characterization.  Generic  Test  I ;  observations  on  test ;  alde- 
hyde characteristics ;  analytical  tables,  Div.  A  (solid  species),  Div. 
B  (liquid  species),  numbered  specific  or  semi-specific  aldehyde  tests. 
Compounds  reducing  Tollen's  reagent,  acetaldehyde,  acrolein,  ben- 
zaldehyde,  formic  aldehyde,  furfurol.  Chapter  IV:  Genus  II  (Sub- 
ord. I,  Ord.  I). — Carbohydrates,  giving  generic  characterization, 
analytical  tables  and  numbered  sectional  and  specific  carbohydrate 
teets.  Chapter  V:  Genus  III  (Subord.  I,  Ord.  I). — Acids,  including 
generic  characterization,  analytical  tables  and  numbered  specific  or 
semi-specific  tests.  Chapter  VI  :  Genus  IV  (Subord.  I,  Ord.  I). — 
Phenolic  compounds,  including  generic  characterization,  analytical 
tables  and  numbered  specific  or  semi-specific  tests.  Chapter  VII  : 
Genus  V  (Subord.  I,  Ord.  I). — Esters,  giving  generic  characteriza- 
tion and  analytical  tables.  Chapter  VIII:  Genus  VI  (Subord.  I, 
Ord.  I). — Acid  anhydrides  and  lactones,  including  generic  charac- 
