soutwell.]     OIL    AND    ASPHALT    IN    SALT    LAKE    BASIN,    UTAH.  475 
rlon.  Joseph  Lippman,  and  J.  R.  Morris,  and  made  special  tests 
:o  ascertain  its  suitability  for  paving  purposes;  the  other  by  Mr. 
Ruschhaupt,  who  investigated  its  suitability  for  other  commercial 
ises. 
Analysis  of  asphalt  from  Rozel,  Utah. 
Per  cent. 
Bitumen  soluble  in  carbon  disulphide 95.00 
Foreign  organic  matter 1.84 
Mincr;i  1  matter   (quartz  sand  and  limestone) P>.  L6 
Total 100.  00 
Analysis  of  the  bitumen  soluble  in  carbon  disulphide. 
Per  cent. 
Bitumen  soluble  in  naphtha,  60-80  b.  p.   (petrolene) 81.25 
Bitumen  insoluble  in  naphtha,  (30-80  b.  p.   (asphaltene) 18.75 
Heat  test. 
Per  cent. 
Loss  on  beating  at  300°  F.  for  twenty-four  hours 2.  .".:: 
Further   loss  on   beating  at  400°    F.   for   twenty-four   hours 
longer ."..  si 
Character  of  residue  left  after  heating   (penetration) 85.00 
Test  for  susceptibility  to  change  in  temperature. 
Penetration  at  ?>2°  F.  (by  No.  2  needle  under  200  grams  for 
one  minute) 12 
Penetration  at  77°  F.  (by  No.  2  needle  under  loo  grams  for 
five,  seconds) 50 
Penetration  at  100°  F.  (by  No.  2  needle  under  50  grains  for 
live    seconds) 170 
Ductility  test. 
Length    in    inches   to   which   cement   will    pull    before   breaking 
at  temperature  of  75°  F 70 
From  these  results  Mr.  Dow  concludes  that  the  cement  yielded  by 
(fining  off  11  per  cent  water  and  volatile  oils  is  of  Wk  good  quality 
id  will,  without  doubt,  make  an  excellent  pavement."  In  a  report 
the  owners  of  this  property,  Mr.  Ruschhaupt  gives  practically 
same  components.  He  further  states  that  the  crude  substance 
itains  no  petroleum  nor  paraffin,  and  that  gum  asphalt  is  its  only 
ted  bnse.  In  view  of  the  composition  and  properties  determined, 
h  concludes  that  after  proper  treatment  this  substance  is  suitable 
ii-  use  as  a  Lubricant,  paint,  garnish,  preservative,  pavement,  and  for 
Bier  purposes. 
•jThe  amount  of  this  substance  obtainable  has  not  been  determined. 
Cniparatively  little  development  work  has  been  done.  The  earliest 
wlrk  known,  according  to  the  Hon.  Joseph  Lippman,  was  done  about 
iei|ht  years  ago  by  Mr.  Jeremiah  Schenck,  who  is  reported  to  have 
