430 
Book  Reviews. 
(Am.  Jour.  Pharm. 
\  September,  1913. 
meaning  of  the  units  of  length,  weight  and  volume  employed  in  the 
United  States,  several  individual  states  undertook  to  define  their 
respective  values.  The  State  of  New  York  passed  a  law  declaring 
that  within  its  borders  a  gallon  shall  be  '  the  volume  of  10  pounds 
of  water  at  400  C.  in  vacuo ' — a  gallon  never  before  heard  of  and 
one  that  has  never  been  used.  Until  that  law  shall  have  been 
repealed  the  use  of  any  other  gallon  is  illegal  in  that  State  and  a 
gallon  conforming  to  that  law  is  illegal  in  all  other  states  and  vio- 
lates the  interstate  commerce  and  revenue  laws  in  all  states,  New 
York  included."  With  an  unusual  breadth  of  mind  Professor  Old- 
berg  has  brought  into  a  single  volume  an  unusual  amount  of  val- 
uable information  which  is  not  only  valuable  but  interesting. 
All  of  the  various  processes  employed  in  practical  pharmacy  and 
the  principles  underlying  pharmaceutical  manipulations  of  all  kinds, 
are  treated  most  minutely  and  extensively.  This  work  will  con- 
tinue to  stand  as  a  monument  to  him  who  may  well  rank  among 
the  greatest  of  teachers  in  pharmacy  that  this  country  has  produced. 
A  Critical  Revision  of  the  Genus  Eucalyptus.  By  J.  H. 
Maiden  (Government  Botanist  of  New  South  Wales  and  Director 
of  the  Botanic  Gardens,  Sydney).  Vol.  II.  Part  7.  Part  XVII  of 
the  complete  work.    (With  four  plates). 
In  this  part  the  following  species  of  Eucalyptus  are  described, 
together  with  their  synonyms,  distribution,  and  affinities : 
Eucalyptus  salmonophloia;  E.  leptopoda;  E.  squamosa;  E.  Old- 
feildii;  E.  orbifolia  and  E.  pyriformis.  The  illustrations  accompa- 
nying this  monograph  are  excellent  and  the  work  is  being  conducted 
with  the  same  degree  of  thoroughness  which  has  characterized  the 
portion  already  published. 
Photomicrographs  of  Spirochetae,  Entamebae,  Plasmo- 
dia, Trypanosomes,  Leishmania,  Negri  Bodies,  and  Parasitic 
Helminths.  Office  of  the  Surgeon  General,  W^ar  Department, 
Washington,  D.  C,  191 3. 
Bulletin,  No.  1  contains  reproductions  of  a  valuable  collection 
of  photomicrographs  which  will  be  of  very  great  help  in  the  study 
and  diagnosis  of  these  parasites.  The  text  not  only  describes  the 
methods  used  in  the  preparation  of  the  specimens  shown,  but  gives 
ample  directions,  clear  enough  to  be  followed  by  every  officer  of 
the  Medical  Corps,  for  the  preparation  of  similar  specimens.  The 
greater  number  of  the  negatives  are  the  work  of  the  late  Dr. 
William  M.  Gray,  of  the  Army  Medical  Museum,  while  the  text 
