Am.  Jour.  Pharm. 
Oct.,  1887. 
Forms  of  Albumen  in  Urine, 
497 
III.  Peptone,  a  product  of  gastric  and  pancreatic  digestion  of  al- 
buminous substances,  also  occurring  in  the  process  of  transformation  ot 
tissues  and  of  inflammatory  effusions.  It  is  a  readily  diffusible  sub- 
stance, occasionally  met  with  in  the  urine  in  association  with  or  apart 
from  serum  albumen. 
TV.  Propeptone,  or  Parapeptone,  or  Hemialbumose,  a  substance  or 
group  of  substances  intermediate  between  albumen  and  peptone,  con- 
stituting a  stage  or  stages  of  transformation  from  the  one  to 
the  other.  It  is  highly  diffusible,  and  is  occasionally  met  with 
in  the  urine  under  conditions  corresponding  to  those  under  which 
peptone  occurs.  This  is  the  peculiar  form  of  albumen  which 
was  discovered  in  the  urine  by  Dr.  Bence  Jones,  in  a  case  of 
osteomalacia. 
V.  Acid  Albumen,  or  Syntonin,  one  of  the  derived  proteids  obtained 
by  the  action  of  acids  upon  albumen.  It  is  easily  produced  artificially 
by  the  addition  of  acid  to  albuminous  urine,  but  may  occur  naturally 
in  certain  cases. 
VI.  Alkali  Albumen,  another  derived  proteid,  produced  by  the 
action  of  alkalies  upon  albumen.  It  is  readily  produced  artificially, 
but  is  also  found  naturally  in  the  urine. 
VII.  Hcemoglobin,  the  combination  of  hamiatin  and  globulin 
naturally  existing  in  the  red  corpuscles  of  the  blood.  It  sometimes 
appears  in  the  urine,  particularly  in  cases  of  hematuria  and  hemo- 
globinuria, also  in  certain  septic  conditions,  and  after  inhalation  of 
arseniuretted  hydrogen,  transfusion  of  blood,  and  otherwise. 
VIII.  Fibrin,  a  proteid  substance  which  does  not  normally  exist 
as  such  in  the  blood.  It  is  met  with  in  the  urine  in  hematuria,  in 
some  cases  of  chyluria,  and  in  certain  varieties  of  renal  casts. 
IX.  Mucin,  the  chief  constituent  of  mucus,  is  a  derived  proteid 
substance.  It  frequently  becomes  superadded  to  the  urine  after 
secretion,  and  may  be  derived  from  any  part  of  the  urinary  tract. 
X.  Lardacein,  Waxy  or  Amyloid  Material,  familiarly  known  as  a 
pathological  substance  within  the  body,  is  said  to  be  occasionally 
demonstrable  in  renal  casts. 
Of  these  ten  varieties  the  last  four  are  of  little  practical  importance 
— mucin  alone  being  indeed  worthy  of  special  comment,  and  that 
mainly  because  of  the  difficulties  which  its  presence  raises  in  regard 
to  the  reliability  of  certain  tests  for  serum  albumen. 
As  to  the  tests  for  the  albumens,  he  puts  in  tabular  form  the 
