460 
Robert  Buns  en. 
/Am.  Jour.  Pharm. 
\     October,  1899. 
of  the  gases  of  the  blast  furnace  process,  which  had  the  very  im- 
portant result  of  showing  their  value  for  fuel,  thus  pointing  out  the 
means  of  effecting  an  enormous  saving  to  the  ironmaster,  as  well 
as  of  improving  his  whole  process.  Incidentally  this  opened  the 
way  for  his  later  studies  on  gasometric  analysis,  which  branch  of 
investigation  he  may  be  said  to  have  created  and  brought  to  the 
highest  perfection. 
Robert  Bunsen. 
In  1840  came  the  invention  of  the  Bunsen  battery  cell,  replacing 
the  platinum  of  the  Grove  cell  by  the  cheaper  element,  carbon,  as 
well  as  gaining  in  electro-motive  force.  In  this  connection  we  may 
state  that  the  suggestion  for  the  use  of  acidified  bichromate  of 
potash  in  the  one  liquid  cell  is  also  said  to  have  been  made  by  Bunsen, 
although  the  form  in  current  use  is  known  as  the  Poggendorf  cell. 
With  a  large  battery  of  the  zinc-carbon  cells,  Bunsen  began,  in 
