Am.  Tour.  Pharm. 
Oct.,  1918. 
Obituary. 
743 
and  anions,  and  of  the  qualitative  analysis  of  alloys.  A  two-page 
"  Solubility  Table,"  giving  the  relative  solubilities  in  water  and  acids 
of  the  compounds  of  25  anions  with  29  cations,  should  be  of  ma- 
terial assistance  to  the  student  in  identifying  any  given  one  of  a 
large  number  of  unknowns. 
The  language  used  in  the  book  is  concise  and  clear,  the  print  is 
clean  and  sufficiently  bold  to  permit  of  easy  reading  when  the  book 
is  used  on  the  laboratory  table,  and,  all  in  all,  the  manual  appears  to 
be  well  adapted  to  fulfil  its  intended  mission, — that  of  teaching  stu- 
dents how  to  identify  the  majority  of  the  substances  with  which 
they  have  to  deal  in  their  every-day  practice. 
F.  P.  Stroup. 
A  Critical  Revision  of  the  Genus  Eucalyptus.    By  J.  H. 
Maiden,  I.S.O.,  F.R.S.,  F.L.S.,  Government  Botanist  of  New 
South  Wales  and  Director  of  the  Botanic  Gardens,  Sydney.  Vol. 
IV,  Part  4,  Part  XXXIV  of  the  complete  work. 
The  part  of  this  critical  monograph  on  the  Genus  Eucalyptus 
now  at  hand  describes  the  following  species — Eucalyptus  redunca 
Schauer,  E.  accedens  W.  V.  Fitzgerald,  E.  cornuta  Labill,  E.  Web- 
steriana  Maiden. 
The  method  of  presenting  the  subjects  is  in  conformity  with  that 
adopted  in  the  preceding  published  parts  of  this  classic  study  and 
adds  descriptions,  ranges,  affinities,  and  varieties  and  uses  of  the 
four  species  described.  The  plates  illustrating  these  species  are  ex- 
cellent and  are  high-class  illustrations  of  the  lithographers  art  in 
depicting  botanical  characteristics. 
G.  M.  B. 
OBITUARY. 
JOHN  A.  DUNN. 
Mr.  Dunn  was  born  in  1840  in  St.  Louis,  Mo.,  and,  from  his 
early  boyhood,  was  the  constant  companion  of  his  dear  friend,  Dr. 
William  F.  Edgar,  of  Los  Angeles,  Cal.  Dr.  Edgar  was  U.  S.  Army 
Surgeon  and  before  the  Civil  War  was  with  the  U.  S.  Government 
Scientific  Survey.  The  deceased,  then  a  boy,  traveled  with  the 
expedition  that  was  detailed  to  run  the  35th  parallel  through  New 
Mexico  and  to  establish  a  U.  S.  Army  Post  at  Albuquerque.  These 
