586 
Book  Reviews. 
(Am.  Jour,  Pharm. 
I     August,  1921. 
strengths  of  saturated  solutions  of  some  of  the  common  salts,  beer 
analysis,  the  specific  rotary  power  of  carbohydrates,  milk  analysis, 
and  a  table  showing  the  percentage  of  chicory  with  coffee  from  the 
percentage  of  aqueous  extract. 
In  addition  to  these  several  explanatory  notes  are  given  on  vol- 
umetric solutions,  logarithms,  computation,  approximations,  indirect 
analysis,  alcoholometry,  food  preservatives,  electrical  units  and  heat 
and  thermo-chemistry. 
A  very  interesting  feature  of  the  book  is  the  presentation  of 
several  concise  descriptions  of  analytical  processes.  For  example, 
one  section  is  devoted  to  the  subject  of  water  analysis,  another  to 
the  cupric  oxide  reducing  powers  of  the  carbohydrates,  another  to 
beer  analysis,  and  still  another  to  the  estimation  of  chicory  in  a  mix- 
ture of  chicory  and  coffee. 
Considerable  value  is  given  to  the  book  by  the  section  on  oils, 
fats  and  waxes,  consisting  of  notes,  tables  and  other  data,  as  well  as 
by  the  pages  devoted  to  notes  on  the  various  indicators.  Some  space 
is  given  to  the  British  regulations  governing  the  sale  of  butter,  mar- 
garine and  milk,  and,  as  might  be  expected  in  a  book  of  this  type, 
the  subject  of  weights  and  measures  is  thoroughly  taken  up  by  the 
use  of  equivalents  and  methods  of  transposition. 
With  its  wealth  and  selection  of  material  this  handy  little  book 
is  bound  to  become  a  helpful  companion  to  the  laboratory  worker 
and  analyst. 
E.  J.  Hughes. 
Travaux  du  Laboratoire  de  Matiere  Medicale  de  La  Faculte 
de  Pharmacie  de  Paris.   Vol.  xii,  1920. 
This  work-  is  divided  into  four  parts :  Part  I  comprises  a  report 
by  fimile  Perrot  and  Ad.  Alland  on  Gum  Arabic,  Senna,  and  several 
other  medicinal,  edible  and  industrial  products  of  the  Anglo-Egyptian 
Soudan.  The  authors  include  in  this  splendid  article  their  observa- 
tions on  the  vegetation  encountered  on  their  trip  from  Cairo  to  Kor- 
dofan,  a  note  on  the  principal  exportations  of  vegetable  products  of 
the  Anglo-Egyptian  Soudan  and  comments  on  the  economic  pros- 
pects of  this  region.   They  have  elaborately  illustrated  it  with  44  fig- 
