310 
Practical  Notes. 
f  Am.  Jour.  Pharuov. 
\      June,  1882. 
obtaining  at  once  a  dark  coloration  and  after  some  time  a  dirty  white 
precipitate.  On  emptying  the  vessel,  the  bottom  on  the  inside  appeared 
rough  as  if  corroded,  and  the  solder  was  similarly  affected  in  several 
places. — Ibid.  p.  147. 
JExtractum  AbsinthU. — E.  Claassen  has  found  perfectly  transparent 
yellow^ish  crystals,  which  proved  to  be  potassium  chloride,  in  the  extract 
of  Artemisia  Absinthium,  Xm.  The  crystals  were  of  great  regularity 
of  form  and  were  combinations  of  the  cube  and  octahedron,  in  some 
of  them  with  a  predominance  of  one  of  the  forms. — Amer.  Jour,  of 
Science,  April,  1882,  p.  323. 
Pepsin  in  Seasickness. — In  a  number  of  cases  pepsin  has  proved 
effectual  for  the  prevention  of  seasickness  in  passengers  who  had  not 
made  a  seavoyage  before.  When  the  first  symptoms  appeared,  pepsin, 
sufficient  to  cover  the  point  of  a  knife,  was  taken,  followed  by  a  glass 
of  water  acidulated  with  5  drops  of  hydrochloric  acid.  The  dose  was 
repeated  several  times  a  day,  more  especially  before  and  after  meals. 
The  favorable  results  obtained  invite  to  further  trials. — Phar.  Ztg.,. 
1882,  No.  20;  Ind.  Blatter. 
Artificial  Hunyadi  Yanos  Mineral  Water,  which  will  be  found  to- 
possess  every  advantage  attributed  to  the  natural  water,  is  made  by 
Prof.  Charteris  by  dissolving  magnesium  sulphate  514*92  grains, 
sodium  sulphate  519*54  grains,  potassium  sulphate  2*76  grains,  sodium 
chloride  39*15  grains,  and  sodium  bicarbonate  15*60  grains,  in  water 
16  ounces.  Dose,  2  ounces  and  upw^ards.  A  product  made  by  follow- 
ing Liebig's  analysis  was  found  to  be  too  weak  and  did  not  produce 
purgative  action. — Phar.  Jour,  and  Trans.,  Feb.  25,  p.  703;  from 
Lancet. 
Preparation  of  Hydrochloric  Acid. — On  heating  a  mixture  of 
calcium  chloride  and  magnesium  sulphate  in  the  presence  of  Avater,.. 
basic  calcium-magnesium  sulphate  and  free  hydrochloric  acid  are 
formed:  CaCl2+MgSO,=(MgO,CaS04)  +  2HCl.  G.  Eschellmann 
employs  this  process  for  the  preparation  of  a  pure  hydrochloric  acid, 
bv  heating  a  soft  mixture  of  calcium  chloride  and  Epsom  salt  or 
kieserite  with  water  to  dull  redness.  Magnesium  chloride  and  calcium- 
sulphate  give  the  same  result.  The  basic  salt  can  be  used  in  the 
manufacture  of  soda  for  the  liberation  of  ammonia  from  sal  ammoniac,, 
magnesium  chloride  and  calcium  sulphate  being  formed,  from  which 
mixture  on  evaporation  and  heating  hydrochloric  acid  is  produced. 
Treated  in  the  above  manner,  ^.  mixture  of  chloride  and  sulphate  of" 
