244 
Book  Reviews. 
5  Am.  Jour.  Pharm. 
(     March,  1921. 
umberland,  Pa.  The  close  proximity  of  his  residence  to  Philadel- 
phia permitted  him  to  make  occasional  visits  to  the  city  and  to  asso- 
ciate with  the  scientific  men  of  Philadelphia  of  that  period,  and 
form  many  lasting  friendships  with  these.  His  several  contributions 
to  the  American  Philosophical  Society  are  referred  to,  and  the  events 
in  his  personal  history  are  feelingly  described. 
In  perusing  the  pages  of  this  book,  one  is  convinced  that  Joseph- 
Priestly  played  an  important  part,  during  his  sojourn  in  America 
in  the  last  ten  years  of  his  life,  by  his  discussions  not  only  on 
chemical  subjects  but  on  political,  theological  and  educational  mat- 
ters, and  withal  science,  as  he  understood  it,  was  interwoven. 
In  this  publication,  the  author  has  added  another  service  to  the 
many  that  he  has  rendered  in  behalf  of  chemical  sciences,  by  reciting 
reminiscences  of  the  later  days,  and  giving  us  a  clear  view  of  the 
events  associated  with  the  career  and  life  of  Joseph  Priestly.  The 
epitaph  on  his  tomb  stone  in  the  Northumberland  burial  ground  is 
peculiarly  appropriate  to  the  character  of  one  whom  we  must  con- 
sider as  a  foremost  philosopher  of  his  day. 
"Return  unto  thy  rest,  O  my  soul,  for  the 
Lord  hath  dealt  bountifully  with  thee. 
I  will  lay  me  down  in  peace  and  sleep  till 
I  wake  in  the  morning  of  the  resurrection." 
G.  M.  B. 
"A  Critical  Revision  of  the  Genus  Eucalyptus."    By  J.  II. 
Maiden,  I.  S.  O.,  F.  R.  S.,  F.  L.  S.    Vol.  V.  No.  3. 
Part  XLIII  of  this  complete  work,  now  in  hand,  continues  this 
classical  study  of  this  genus  of  plants  so  important  to  Australia  from 
both  a  botanical  and  economical  viewpoint.  The  uniform  plan  of 
treatment  of  the  subjects,  adopted  in  the  preceding  parts  of  this 
work,  are  continued  in  the  present  section.  In  this  the  following 
species  are  considered :  Eucalyptus  ficifolia  F.  v.  M. ;  E.  calophylla 
R.  Br.;  E.  hcematoxylon  Maiden;  E.  metadata  Hook;  E.  Mooreana 
(W.  V.  Fitzgerald)  Maiden;  E.  approximans  Maiden,  and  E.  Sto- 
wardi  Maiden. 
The  four  plates  in  this  part  maintain  fully  the  high  artistic 
illustrations  that  are  characteristic  of  this  monographic  study. 
G.  M.  B. 
