262  Mi7}eral  Springs  in  Idaho,  etc. 
To  compare  these  preparations  they  were  tried  with  coagulated 
albumen. 
No.  1.  Six-tenths  (^q)  of  a  grain  of  the  dry  mucus  dissolved  12: 
grains  albumen. 
No.  2.   One  fluidrachm  of  the  glycerin  preparation   dissolved  12: 
grains  of  albumen. 
No.  3.   Five  fluidrachms  (,5v)  of  the  watery  solution  dissolved  12: 
grains  of  albumen. 
The  above  result,  however,  does  not  represent  the  utmost  solving: 
power,  excepting  of  No.  1.  Nos.  2  and  3  suffered  losses  of  pepsin. 
No.  2  lost  pepsin  on  account  of  being  digested  and  warmed  while  still 
in  contact  with  the  mucous  membrane,  and  I  am  sure  considerable- 
pepsin  was  lost,  as  the  mass  became  quite  soft  and  pulpy.  The  pro- 
cess should  be  carried  on  cold.  No.  3  lost  some  of  the  precipitate 
during  washing.  This  process  is  not  practicable  in  warm  weather,  as- 
the  liquors  decompose  rapidly. 
Summing  up  my  experience,  I  should  take  No.  2  as  the  process 
furnishing  the  most  permanent  preparation,  being  agreeable  both  to* 
the  eye  and  the  palate  of  the  patient.  It  has  a  bright,  clear  straw 
color,  an  agreeable  bland  taste,  and  could  be  made  double  the  above- 
strength.  It  is  not  subject  to  the  changes  and  other  objections  of  the 
powders,  is  ready  when  it  passes  out  of  the  hands  of  the  apothecary,, 
without  further  mixing,  and  not  objectionable  in  taste  to  the  most 
fastidious. 
Covin-gton,  Ky>,  May  12,  1871. 
MINERAL  SPRINGS  IN  IDAHO  AND  THEIR  CALCAREOUS  DE- 
POSITS. 
By  A.  R  RoESSLER. 
A  large  number  of  samples  of  water  from  these  springs  have  beei> 
received  at  the  Geological  Museum  of  the  U.  S.  General  Land  Office^ 
through  courtesy  of  Hon.  Wm.  H.  Hooper  of  the  House  of  Repre- 
sentatives. They  are  situated  in  the  south-eastern  part  of  the  Terri- 
tory, on  the  sources  of  Bear  River  which  empties  into  the  north  part 
of  Great  Salt  Lake,  and  contributes  largely  to  the  saline  contents  of 
that  dead  sea  of  America.  The  names  by  which  the  formations  are^ 
designated  indicate  their  character  to  some  extent,  being  named  re- 
