220 
V arieties. 
Am.  Jour.  Pharm. 
April,  1880, 
VARIETIES. 
Poison  for  Rats  and  Mice. — A  mixture  of  i  part  precipitated  barium  carbonate, 
3  parts  barley  flour  and  sufficient  water  to  make  a  mass,  is  rolled  into  pills,  having 
the  size  of  beans.  These  are  said  to  be  fully  as  efficacious  as  phosphorus  pills,  and 
are  decidedly  cheaper. — Pharm  Ztschr.f.  Russel.y  1879,  P-  ^3^'  from  Drag.  Ztg. 
A  preparation  for  poisoning  parasites  on  animals  and  plants,  patented  by  J. 
Wilson,  is  made  by  melting  50  parts  tallow,  or  another  cheaper  fat,  and  25  parts 
rosin,  adding  50  parts  crude  soda  and  25  parts  borax,  boiling  with  water,  adding  75 
parts  carbolic  acid  and  30  parts  calcium  sulphide  solution,  and  finally  80  parts  extract 
of  tobacco.  The"  inventor  thinks  that  this  mixture  forms  sulphoglycerol-carbolate 
■of  nicotin. — Ber  d.  Deutsch.  Chem.  Ges.,  1879,  P-  ^^95- 
Water  Proof  Leather  A  preparation  for  this  purpose,  patented  by  J.  A.  Rosa,  of 
Paris,  consists  of  a  solution  of  ordinary  rosin,  or  another  resin,  in  turpentine,  petro- 
leum ether,  etc. — Ibid.,  p.  2194. 
Carbolic  varnish,  suitable  for  spreading  on  damp  walls,  and  also  on  wood,  for  the 
purpose  of  preserving  it,  is  made  by  dissolving,  in  an  iron  kettle,  100  parts  borax 
and  50  parts  caustic  soda  in  4,000  parts  water,  heating  to  the  boiling  point,  gradually 
adding  450  parts  shellac,  stirring  constantly,  and,  after  cooling  or  when  lukewarm, 
adding  200  parts  90  to  95  per  cent,  pure  carbolic  acid.  This  varnish  is  applied 
lukewarm,  and  is  frequently  diluted  with  one-third  its  bulk  of  hot  water. — Pharm. 
■Centralb  ,  Dec.  11,  1879,  p.  463. 
An  excellent  paint  for  damp  walls,  highly  recommended  by  D,  Johannsen,  con- 
sists of  rosin,  boiled  linseed  oil  and  oil  of  turpentine,  each  5  parts,  and  white 
chalk  15  parts. — Phar?n.  Ztg.,  1879,  P  ^^5- 
Sulpho-Methylate  of  Sodium. — A  New  Purgative.— M.  Rabuteau  has  investi- 
gated a  new  purgative,  analogous  to  sulpho-vinate  of  sodium.  It  is  obtained  by  treating 
methyl  alcohol  with  sulphuric  acid,  when  methyl-sulphuric  acid  and  water  are 
•obtained.  This  product  is  neutralized  with  carbonate  of  barium,  when  the  excess  of 
sulphuric  acid  is  thrown  down  in  the  insoluble  form  of  barium  sulphate,  and  there 
remains  in  solution  sulpho-methylate  of  barium,  a  substance  which  is  very  soluble, 
and  which  can  be  crystallized.  It  is  then  treated  afresh  with  sulphuric  acid,  which 
liberates  pure  sulpho-methylic  acid,  which  yields  sulpho-methylate  of  sodium  when 
neutralized  with  soda.  The  salt  is  white  and  very  soluble,  crystallizing  with  diffi- 
culty, of  a  feeble  taste  comparable  to  that  possessed  by  sulpho-vinate  of  sodium,  with 
a  sweet  after-taste.  Unfortunately  it  decomposes  very  rapidly  into  sulphate  of  sodium 
and  methyllc  products  of  a  slightly  garlic-like  odor.  Ten  grams  of  the  salt  in  25  cc. 
■of  water  injected  into  the  veins  of  a  dog  produced  constipation.  Acting  upon  the 
observation  that  the  substance  when  introduced  into  the  blood  gave  rise  to  constipa- 
