i/6  Behavior  of  Metals  with  Gases.  {^KisS?™-* 
cipitate  is  formed  which  is  soluble  in  alcohol  and  slightly  so  in 
water,  and  forms  with  the  alkaline  bases  soluble  salts  (resorcinal- 
ginates).  The  ammonium  salt  is  very  soluble  in  water  and  has  a 
saccharine  taste. — A.  Petit,  in  J  our.  de  Pharm.  et  de  Chim.,  March, 
1893,  p.  294. 
For  chapped  hands. — The  following  formula  is  published  in  Jour, 
de  Pharm.  et  de  Chim,  March,  1893,  P-  29^-  Green  soap,  1  part; 
compound  tincture  of  benzoin,  4  p.;  glycerin,  8  p.;  and  rose  water, 
16  p. 
Corn-cure — The  following  formula  will  be  found  in  Journ.  de 
Pharm.  et  de  Chim.,  Feb.,  1893,  24<3-  Dissolve  extract  of  Indian 
cannabis  1  part,  salicylic  acid  10,  and  turpentine  5,  in  collodion  82, 
and  add  2  parts  acetic  acid. 
BEHAVIOR  OF  SOME  METALS  WITH  GASES. 
By  G.  Neumann. 
The  portion  of  this  investigation  relative  to  hydrogen  has  been 
executed  by  the  author  in  conjunction  with  F.  Streintz.  Their 
attention  was  drawn  to  the  question  by  the  view  that  lead  as  the 
negative  plate  of  a  secondary  element  is  capable  of  occluding 
hydrogen. 
A  proof  for  the  correctness  of  this  view  could  not  be  obtained  by 
direct  electrolytic  experiments,  as  the  arrangement  of  the  experi- 
ment proved  too  difficult.  Better  results  were  obtained  on  allowing 
pure,  dry  hydrogen  to  pass  through  melted  lead  in  a  JJ-tube. 
After  the  gas  had  been  passed  for  a  considerable  time,  the  excess 
was  driven  out  by  nitrogen.  Oxygen  was  then  passed  through, 
and  this  again  was  expelled  by  dry  air.  The  water  formed  by  the 
action  of  oxygen  was  received  in  calcium  chloride  tubes  and 
weighed,  and  the  quantity  of  hydrogen  absorbed  by  the  metal  was 
thus  calculated.  In  two  experiments  which  could  be  regarded  as 
successful  the  result  was  in  one  case  0-15  times  the  volume  of  the 
metal,  and  in  the  other  01 1  times.  Hence  the  occluding  power  of 
lead  for  hydrogen  seems  demonstrated. 
The  next  experiments  were  made  with  palladium.  This  metal,  as 
is  well  known,  occludes  hydrogen  very  greedily.  The  experiments 
as  well  as  those  with  other  metals  still  to  be  mentioned,  were 
executed  in  an  analogous  manner  to  those  on  lead,  i.  e.,  the  dry 
