340 
Volumetric  Analysis, 
(  Am.  J  cur.  Pharn?^ 
t      July,  1880. 
A  SIMPLE  DEVICE  FOR  FILTRATION. 
By  D.  Anson  Partridge. 
The  cut  represents  a  simple  but  efficient  arrangement  for  filtration 
under  atmospheric  pressure. 
J  B  C  h  2L  glass  tube  three  inches  in> 
length,  and  about  three-eighths  of  an  inch 
internal  diameter. 
At  J  the  tube  is  drawn  tapering,  to 
make  it  fit  closely  to  a  rubber  tube  three- 
sixteenths  of  an  inch  calibre,  which  passes, 
inside  of  the  glass  tube.  A  short  piece 
of  glass  tube  is  inserted  into  the  rubber 
tube  at  J  to  make  a  tight  joint ;  the 
lower  end  of  this  rubber  tube  is  closed  by 
inserting  a  short  piece  of  glass  rod.  At 
B  a  smooth  slit  is  made  in  the  rubber 
tube  three-eighths  of  an  inch  long  (as 
recommended  by  Bunsen)  to  act  as  a  valve. 
On  the  projecting  short  limb  of  the  glass  tube  is  a  piece  of  rubber 
tube,  one-eighth  of  an  inch  calibre  and  about  one  inch  long  ;  the  outer 
end  of  this  tube  is  closed  by  a  piece  of  glass  rod.  At  C  a  slit  is  made 
in  the  tube  to  serve  as  a  valve. 
The  lower  end  of  the  glass  tube  is  drawn  out  to  adapt  it  to  a  rubber 
ball  of  about  two  inches  dianieter. 
This  little  apparatus,  when  adapted  to  a  pint  flask,  will,  with  a  few 
compressions  of  the  ball,  afford  a  pressure  equivalent  to  a  column  of 
water  8  to  i  o  feet  high.  / 
VOLUMETRIC  ANALYSIS  OF  LIQUIDS  AND  SOLIDS. 
By  Alfred  B.  Taylor. 
Analysis  is  the  separation  of  a  compound  into  its  several  parts. 
Qualitive^  analysis  is  the  determination  of  the  parts,  without  refer- 
ence to  quantities,  while  quantitive  analysis  determines  also  the  quanti- 
ties of  the  parts,  thus  showing  their  relative  proportions. 
^  "  Qualitive  "  and  "  quantitive  "  (from  "  qualis  "  and  "  quantum  ")  would  seem- 
to  be  much  better  words  than  "qualitative"  and  "quantitative"  (from  "qualitas"' 
and  "  quantitas         Ti  ta-tive  is  about  as  barbarous  as  '*  te-to-tum." 
