AmluJ.?5&irm-}  Gleanings  from  the  German  Journals.  409 
Russian  peppermint  oil  has  been  chemically  examined  by  G. 
Andres  and  A.  Andreef;  they  find  that  17  volume  per  cent,  of  the 
oil  is  made  up  of  the  hydrocarbons  laevo-limonene,  menthene  and 
pinene ;  the  lowest-boiling  fraction  gave  indications  of  a  naphthy- 
lene  C10H1S.  Experiments  were  also  made  proving  that  the  distilla- 
tion of  the  fresh  and  the  air-dried  herb  gave  identical  products.  The 
chief  constituents  of  the  oil  are  menthol  and  menthone. — Bcrichte  ; 
Pharm.  Ztg.,  1892,  405. 
Agathine,  also  called  salicylaldehyde-a-methylphenylhydrazone, 
has  been  found  to  give  good  results  in  neuralgic  and  anti-rheumatic 
conditions  in  doses  of  0-12-0-5  gm-  (2~7  grains)  two  or  three  times 
daily :  the  action  is  not  immediate  but  shows  after  a  few  days  when 
4-6  grams  have  been  administered.  The  compound,  when  pure, 
forms  small  white  laminae  melting  at  720  C;  it  is  insoluble  in  water, 
but  soluble  in  alcohol,  ether,  benzol,  ligroin  ;  boiling  with  concen- 
trated hydrochloric  acid  decomposes  it.  The  formula  is  given  as 
C6H4.OH.CH:N.N.CH3.C6H5;  it  is  made  by  the  Hbchster  Farb- 
werke. — (D.  Med.  Ztg.)  Pharm.  Ztg.,  1892,  414.      .  » 
Diamond  cement. — 500*0  finest  glue  are  allowed  to  soften  and 
swell  for  several  hours  in  400-0  water  and  ioo*o  acetic  acid  (96  per 
cent.);  it  is  then  warmed  until  dissolved  and  i-o  pure  carbolic  acid 
added. 
Universal  cement. — 250  0  sugar  placed  in  a  flask  are  dissolved  in 
750  0  water  by  aid  of  a  water-bath,  65-0  slaked  lime  added  and 
the  mixture  warmed  for  3  days  at  7°-75°  C.,  agitating  repeatedly. 
After  cooling,  the  supernatant  liquid  is  poured  off  clear ;  200-o  are 
diluted  with  2000  water  and  550  0  finest  glue  allowed  to  swell  in  it 
for  three  hours,  when  it  is  heated  until  perfect  solution  takes  place; 
after  restoring  the  original  weight  by  adding  water,  50-0  acetic  acid 
(96  per  cent.)  and  i-o  pure  carbolic  acid  finish  the  preparation. 
Syndetikon. — In  400  0  of  the  sugar-lime  solution  (see  above) 600  0 
ground  glue  are  allowed  to  soften  for  three  hours ;  after  heating-  to 
effect  solution  and  replacing  the  evaporated  waste,  the  cement  is 
neutralized  with  oxalic  acid  (about  300)  and  i-o  carbolic  acid 
added. — E.  Dieterich,  Pharm.  Ztg.,  1892,  154. 
Cement  for  porcelain. — 20-0  white  lead  and  12-0  pipe  clay,  care- 
fully dried,  are  incorporated  with  IO-O  boiled  linseed  oil  heated  on  a 
water-bath  ;  the  cemented  articles  are  dried  slowly  in  a  warm  place. 
— (Industrie-Bl.)  Pharm.  Centralhalle,  1892,  330. 
