XtS'eS1"'}    Recent  Literature  Relating  to  Pharmacy.  451 
Finally,  the  bulbs  are  weighed  again,  and  the  increase  in  weight 
is  the  amount  of  carbon  dioxide  generated  by  the  fermentation. 
From  this  the  glucose  can  easily  be  calculated,  by  the  following 
argument : 
C6H12Oe  =  2C2H5OH  +  2C02 
Glucose.  Alcohol.  Carbon  Dioxide. 
(I79-58)  (9I'8o)  (87-78) 
Each  87-78  parts  of  carbon  dioxide  represent,  therefore,  179- 5 8 
parts  of  glucose,  or  1  part  is  the  equivalent  of  2-0458  parts  of 
glucose.  By  multiplying  the  calculated  weight  of  the  carbon 
dioxide,  therefore,  by  2-0458,  the  exact  amount  of  glucose  con- 
tained in  the  urine  under  examination  can  be  ascertained.  From 
this  the  percentage,  as  well  as  the  total  amount  of  glucose  passed 
in  twenty-four  hours,  can  easily  be  calculated. 
A  number  of  experiments  made  with  this  apparatus  with  solu- 
tions of  glucose  of  known  strength,  showed  that  an  almost  abso- 
lute exactness  is  obtained. 
PRESERVATION  OF  GRAPE  JUICE. 
The  process  of  preparing  unfermented  grape  juice  is  described  by 
J.  Craig  {Canada  Expt.  Farm's  Rpts.,  1896,  p.  165),  and  sixteen 
experiments  on  the  preservation  of  the  juice  are  reported.  The 
results  indicate  "  that  the  natural  flavor  of  the  grape  juice  may  be 
preserved  intact  by  raising  the  temperature  of  the  juice  gradually 
to  1700  F.,  keeping  it  at  this  point  for  ten  minutes,  and  then 
quickly  bottling  it,  taking  care  to  use  absolutely  air-tight  and  thor- 
oughly sterilized  vessels.  .  .  .  The  addition  of  sugar  in  the 
proportion  of  4  ounces  to  each  quart  of  liquid  will  improve  the 
quality  and  palatability  of  the  juice  of  the  more  acid  varieties  of 
grapes.  .  .  .  The  use  of  antiseptics,  such  as  salicylic  acid, 
should  not  be  encouraged." 
CASHEW  POISONING. 
In  an  article  by  Williams  in  your.  Jamaica  Agric.  Soc,  1897,  P« 
319,  on  cashew  (mesquite)  poisoning,  the  author  says  that  when 
animals  are  fed  with  this  legume  (Prosopis  juliflord)  they  become 
slick,  glossy,  and  look  well.  The  animals  seem  very  fond  of  it.  But 
when  it  is  damaged  by  rains,  heavy  dews,  etc.,  it  is  poisonous. 
Animals  that  eat  it  when  it  is  in  the  poisonous  condition  become 
