PROPERTIES    AND    TESTS    OF    FULLER 's    EARTH.  275 
Table  5. — Results  of  oil  tests  of  fuller' s  earth  and  other  materials — Continued. 
Material. 
fuller's  earth— continued. 
Extracted  with  concentrated  IIC1: 
Owl ; 
Fairbank 
Eimer  «&  Amend 
Decomposed  with  concentrated  H2S04: 
Owl,  heated  6  days 
Fairbank,  heated  6  days 
Eimer  &  Amend,  heated 
Do 
Do 
Extracted  with  alkalies: 
Fairbank,  extracted  with  5  percent  NaCII 
Fairbank,  extracted  with  5  per  cent  NaOH,  rewashed . 
Fairbank,  extracted  with  5  per  cent  NaOH,  fine  part. 
Fairbank,  extracted  with  Na2C03,  half-saturated 
Eimer  &  Amend,  extracted  with  5  per  cent  NaOH 
Eimer,  extracted  with  concentrated  Na2C03 
Extracted  with  acids  and  alkalies: 
Owl,  extracted  with  dilute  HC1  and  NaOH 
Fairbank,  extracted  with  dilute  HC1  and  NaOH 
Eimer  &  Amend,  extracted  with  H2SO4  and  Na2C03. . 
Miscellaneous  treatments: 
Fairbank,  extracted  with  NIL,OH  and  dried  at  130°  C. 
Fairbank,  exposed  to  N  H3  gas  for  24  hours 
Fairbank,  saturated  with  alum  solution  and  dried 
Color  value  of  oil. 
Imme-  After 
diately  standing 
after  fil-  12  hours 
tration.  in  dark. 
PIPE   CLAY. 
Untreated 
Dried 
Decomposed  with  H2SO*. 
Ground  to  f  gr 
CLAYS. 
Settlings  or  sandy  part 
Fine  part 
Decomposed  with  H2SO4 
Extracted  with  Na2C03 
With  1  per  cent  HC1  and  just  enough  NH4OH  to  neutralize. 
Exposed  to  NH3 
With  4  per  cent  boiled  starch 
ARTIFICIAL  ALUMINAS. 
Precipitated  with  NH4OH  and  dried  at  150°  C 
Precipitated  with  NH4OH  and  washed  in  alcohol  and  ether 
No.  46  reboiled  and  dried  at  120°  C 
Boiled  30  hours  and  dried  at  130°  C 
No.  42  only  partially  dried 
Ignited 
Precipitated  with  75  per  cent  powdered  glass 
Precipitated  from  KOH  solution  by  CO2 
ARTIFICIAL  SILICAS. 
Precipitated  from  Na2Si03,  washed  in  alcohol  and  ether,  and  air 
dried 
Precipita  ted  and  ignited 
From  decomposition  of  Na2Si03  by  H2S04 
OTHER  SUBSTANCES. 
Limestone,  100-mesh 
Sdiceous  iron  ore 
Emery  hour 
Powdered  glass 
Bone  ash 
Carbo  leached  with  1  per  cent  HC1 
Calcium  phosphate  precipitated 
Aluminum  phosphate  precipitated 
Ferric  hydrate  precipitated 
After 
standing 
2  weeks  in 
light. 
