508 
Analysis  by  Capillarity. 
J  Am.  Jour.  Pharru. 
1         Oct.,  1884. 
hours,  then  transferred  to  a  water-bath  and  boiled  for  about  two  hours. 
After  cooling,  the  liquid  was  poured  off  from  the  resin,  filtered,  placed 
in  an  open  dish,  loosely  covered  and  set  aside  to  crystallize.  The 
crystals  were  then  washed  with  a  little  alcohol  and  dried.  The  yield 
was  about  10  per  cent. 
ANALYSIS  BY  CAPILLARITY. 
By  Hans  M.  Wilder. 
Prof.  J.  U.  Lloyd's  article  in  the  September  number  reminds  me  of 
an  article  by  Goppelsroeder,  in  the  "  American  Journal  of  Pharmacy  " 
for  1863  (vol.  xxxv,  p.  178),  wherein  he  shows  that  a  mixture  of  sev- 
eral colors  may  very  well  be  analyzed  (so  to  speak)  by  means  of  blot- 
ting paper  ;  the  different  colors  spreading  out  unequally — sufficiently 
so  as  to  separate  distinctly.  In  the  same  article  he  refers  to  an  earlier 
paper  by  Schoenbein,  "on  the  different  heights  to  which  bodies  in  solu- 
tion rise  by  immersing  one  end  of  a  strip  of  blotting  paper." 
Leroy,  "  American  Journal  of  Pharmacy"  for  1861  (vol.  xxxiii, 
p.  93),  proposes  the  same  means  for  examining  various  compound 
tinctures,  comparing  them  to  a  standard. 
Prof.  Lloyd  mentions  the  height  to  which  chloride  of  sodium  in 
solution  rises  (some  six  feet).  In  this  connection  it  will  be  interesting 
to  read  a  paper  by  Frankenheim  ("  Poggendorff 's  Annalen,"  lxx,  p. 
515 ;  condensed  in  Watt's  Dictionary,  p.  741),  on  the  height  to  which 
different  liquids  rise. 
Musculus  (Watt's  Dictionary,  1st  Suppl.,  p.  393,  and  in  extenso  in 
"  Phar.  Jour,  and  Transactions  "  [2],  ix,  p.  171)  recommends  capillarity 
as  a  delicate  analytical  method  for  the  detection  of  several  substances, 
especially  of  alcohol  and  acetic  acid  in  aqueous  solutions. 
The  capillary  power  of  saline  solutions  is  discussed  by  Buliginski 
("  Poggendorff 's  Annalen,"  cxxxiv,  p.  440 ;  condensed  in  Watt's  Dic- 
tionary, 2d  Suppl.,  p.  244). 
Philadelphia,  September  11th,  1884. 
Note  by  the  Editor. — The  results  of  Schoenbein's  experiments, 
referred  to  above,  are  thus  briefly  summarized  in  "  Jahresbericht  der 
Chemie,"  1861,  p.  63:  "Experiments  with  strips  of  filtering  paper, 
dipping  with  the  lower  end  into  dilute  solutions  of  alkalies,  alkaline 
