The  main  partings  are  well  defined,  and  incline  to  the  surfaces  of
deposition  in  angles  of  85°  and  95°.  The  cross-partings  are  also  in
many  specimens  unusually  well  defined ;  smooth  and  brilliant  plane
surfaces,  inclined  to  the  main  partings  in  angles  of  88.5^  and  91.5°,  and
to  the  surfaces  of  deposition  in  70°  and  110°.  The  coal  thus  separates
into  rhombic  prisms.
Occasional  specks  of  sulphurct  of  iron  present  themselves  in  the  natu-
ral partings.
The  specific  gravity  of  one  specimen  of  this  coal  was  found  to  be
1.3225,  that  of  anotlier  1.3404 ;  the  mean  of  which  gives  the  calcu-
lated weight  of  1  cubic  foot  of  solid  coal  equal  to  83.22  pounds.
Nineteen  trials  in  the  charge-box  proved  its  average  weight  to  be  50.335
pounds  per  cubic  foot,  or  0.6048  of  its  calculated  weight

The  space  for  stowing  1  ton  is  44.502  cubic  feet  Of  moisture  it  con-
tains, by  the  analytical  operations,  0.646  and  0.557  per  cent,  as  deter-
mined by  two  specimens.  By  trial  in  the  steaming  apparatus,  the  pro-
portion of  moisture  was  found  to  be  0.836  per  cent

One  specimen  examined  for  sulphur  gave  0.1019  per  cent  of  that  in-
gredient

''^  volatile  matter,  other  than  moisture,  was  17.791  and  17.071  for

"0  apecimens  above  referred  to ;  and  the  total  volatile  matter  in  two

ns  examined  by  Doctor  King  was  17  for  one,  and  22  per  cent

v.  The  average  will  not,  therefore,  be  fiur  from  true,  if  assumed

"attons  of  each  of  the  first-mentioned  specimens  gave  a  mean
ti  of  earthy  tuattox  for  the  one,  and  7.57  for  the  other,
tition  b  as  ffiUo^B  *.
Doc.  No.  276.  269

Specimen  m.  Specimen  6.
