114  Literature  Relating  to  Pharmacy.  {AFe'braar'yTf897.m" 
warmed  for  any  length  of  time  with  alkalies,  earthy  oxides  or  hy- 
drated  lead  oxide. —  The  Journal  of  the  Society  of  Chemical  Industry, 
October  31,  i8g6. 
analysis  of  chloroform.   {Gay,  in  J.  Pharm.  Chim.,  1896,  4,  259) 
(1)  A  piece  of  filter  paper  saturated  with  the  chloroform  should 
dry  completely,  and  the  odor  remain  pleasant  to  the  end.  The  con-- 
trary  indicates  the  presence  of  amyl  alcohol. 
(2)  Shake  6  c.c.  with  3  c.c.  of  water  and  test  with  litmus  paper ; 
this  should  not  be  reddened. 
(3)  Shake  with  an  equal  volume  of  10  per  cent,  silver  nitrate ;  a 
white  precipitate  on  standing  indicates  the  presence  of  hydrochloric 
acid,  and  a  black  precipitate  on  boiling,  that  of  aldehyde  or  acetone. 
(4)  To  5  c.c.  add  2  c.c.  of  a  solution  of  1  part  of  potassium  bi- 
chromate in  100  parts  of  strong  sulphuric  acid,  and  warm  gently; 
if  alcohol  be  present  a  green  coloration  appears.  A  quantitative 
test  for  alcohol  is  necessary,  since  0  5  per  cent,  may  be  added  to 
preserve  the  chloroform.  To  5  c.c.  add  1  c.c.  of  Mohr's  solution 
(1  part  of  potassium  permanganate  and  10  parts  of  alcoholic  potash 
dissolved  in  25  parts  of  water)  in  such  a  manner  that  the  liquids  do 
not  mix ;  then  shake  whilst  slowly  turning  the  tube,  and  observe 
the  time  between  the  mixture  and  the  appearance  of  a  green  color. 
Time  :  5  minutes  Very  pure  chloroform. 
"       2*5-'"        .  o*oi  per  cent,  alcohol. 
"       3'5  seconds  o*i        "  " 
"       5      "   0-5 
"       Less  than  5  seconds  .  .  more  than  o"5        "  " 
One  agitation  i*o        "  " 
(5)  Shake  violently  10  c.c.  with  an  equal  volume  of  strong  sul- 
phuric acid  and  let  stand.  The  mixture  remains  colorless,  even  for 
an  hour,  if  the  product  is  pure,  but  if  it  becomes  brown,  the  pres- 
ence of  chloro-derivatives  of  ethyl  alcohol  or  of  the  higher  homo- 
logues  is  indicated. —  The  Journal  of  the  Society  of  Chemical  Indus- 
try, October  jif  1896. 
The  quantity  of  quicksilver  exported  by  the  mines  of  Auerbach  &  Co. ,  at 
Nikotovka,  Russia,  in  the  course  of  last  year,  amounted  to  10,706  bottles,  which 
went  to  various  Buropean  countries,  China,  India  and  to  the  Transvaal.  For 
consumption  in  Russia  1,596  bottles  were  sold.  The  output  is  steadily  increas- 
ing.— Chemist  atid  Druggist,  December  5,  1896. 
