JoMaMr.tm3RM'}    DrV  Material  from  Fresh  Vegetables.  Ill 
Qlycerin  lemonade  in  diabetes  mellitus. — 0.  Schultzen  recommends 
the  following,  which  is  to  be  taken  during  the  day:  Glycerin  20  to 
50  grams,  water  1000,  citric  or  tartaric  acid  5  grm. — Ibid.,  No.  2. 
Ferrous  sulphate,  precipitated  by  alcohol,  was  stated  by  Barckhau- 
sen*  to  contain  less  water  of  crystallization  than  the  crystallized  salt. 
L.  Caro  has  analyzed  this  salt,  and  found  it  to  contain  seven  mole- 
cules of  water,  the  same  as  the  crystallized  preparation.  By  titra- 
tion with  permanganate,  he  found  it  of  the  same  composition  after  a 
month's  exposure  to  the  atmosphere. — Annalen  d.  Chem.  u.  Pharm., 
clxv,  29—32. 
The  water  air  pump. — Prof.  R.  Bunsen  publishes  a  card,  in  which 
he  states  that  the  discovery  of  the  fact  that,  by  columns  of  liquids 
flowing  downwards  a  more  perfect  vacuum  can  be  obtained  than  by 
other  means,  belongs  solely  to  Dr.  Sprengel,  who  published  his  re- 
searches in  the  Journal  of  the  Chemical  Society  January,  1865;  in 
his  paper  on  filtration  under  pressure,  published  in  1868,  he  gave  due 
credit  to  the  inventor. — Ibid.,  159,  160. 
Oxalate  of  iron  is  recommended  by  Dr.  Girard  for  medicinal  pur- 
poses, and  a  report  on  this  preparation,  by  M.  E.  Caventou,  is  pub- 
lished in  Journal  de  Pharmacie  et  de  Chimie,  1873,  61,  63. 
This  salt,  which  is  now  officinal  in  the  United  States  Pharmacopoeia, 
has  been  employed  medicinally  in  this  country  for  a  number  of  years? 
and  was  first  recommended  by  Dr.  G.  O.  Schseffer,  of  Washington, 
D.  C,  in  1854.  See  Proceedings  of  the  American  Pharmaceutical 
Association,  1867,  page  407,  and  1869,  page  389. 
ON  THE  YIELD  OF  DRY  MATERIAL  FROM  FRESH  VEGET- 
ABLES. 
By  Dr.  G.  C.  Wittstein. 
The  author  gives  in  his  Vierteljahres  Schrift,  1873,  p.  106,  the  fol- 
lowing table,  compiled  from  memoranda  of  his  own  observations  made 
in  1828  and  1829.  The  yield  is  given  for  the  air-dry  material  ob- 
tained from  one  part  of  the  fresh. 
*  American  Journal  of  Pharmacy,  1872,  p.  163. 
