154  SMITHSONIAN    MISCELLANEOUS    COLLECTIONS  VOL.    96 
surfaces,  tapering  to  a  point  below.  Figure  20  is  a  piece  of  carbon- 
aceous shale  with  four  faceted  surfaces,  which  indicate  its  use  as  a 
rubbing  tool ;  a  deep  groove  along  one  edge  is  evidence  of  sawing  or 
rubbing  with  an  edged  implement. 
Ads  blades. — Six  adz  blades  were  found  at  the  Hillside  site,  the 
type  being  illustrated  in  plate  42,  figure  21.  This  was  made  from  a 
small  beach  boulder  of  basalt,  the  natural  surface  of  which  forms 
the  outer  face.  It  has  been  shaped  by  crude  chipping  on  the  back 
and  along  two  edges.  The  cutting  edge  is  somewhat  rounded  and 
beveled,  meeting  the  flat  edge  of  the  back  side  at  an  angle  of  about  45" 
Rubbing  stones  and  whetstones. — Rubbing  stones  of  dififerent  ma- 
terials and  a  variety  of  forms  were  found  at  the  Hillside  site.  The 
most  striking  of  these  were  columnar  or  pyramidal  blocks  with  five 
smoothed  surfaces.  Five  of  these  were  found  at  the  Hillside  site  (pi. 
43,  figs.  1-5)  and  several  others  at  Miyowagh.  Figure  i,  of  basalt, 
is  shown  resting  on  its  broadest  surface,  which  is  4  cm  wide  at  the 
upper  end,  tapering  to  a  width  of  3.5  cm  at  the  lower  end.  The  right 
side,  which  is  seen  foreshortened  in  the  photograph,  rises  vertically, 
while  the  left  side  rises  at  a  60°  angle.  The  right  side  is  slightly  wider 
than  the  left,  the  average  widths  (at  center)  being  3  cm  and  2.7  cm 
respectively.  The  two  upper  surfaces,  averaging  2.6  cm  in  width,  rise 
from  the  sides  at  an  angle  of  45°.  All  five  of  the  slightly  tapering  sides 
are  smoothed  down  to  a  perfect  plane;  the  two  ends  are  unworked. 
Plate  43,  figure  2,  of  vesicular  basalt,  is  identical  with  plate  43,  figure 
I,  in  the  arrangement  and  proportions  of  the  five  smoothed  surfaces. 
It  differs  in  that  it  is  less  tapering.  The  upper  end  is  the  rounded 
water-worn  surface  of  the  original  beach  boulder  from  which  it  was 
fashioned.  The  lower  end  is  broken.  Plate  43,  figure  3,  is  of  fine- 
grained sandstone,  pyramidal  or  tapering  in  shape,  with  the  five  sur- 
faces rubbed  down  at  the  same  angles  as  plate  43,  figures  i  and  2. 
Figure  4,  of  basalt,  is  still  more  distinctly  pyramidal  in  shape,  but 
here  again  the  angles  formed  by  the  faceted  areas  are  essentially  the 
same  as  those  already  described.  Plate  43,  figure  5,  is  made  from  a 
small,  rounded  beach  boulder  of  vesicular  basalt.  It  also  has  five 
smoothed  sides,  but  the  inclinations  of  these  differ  somewhat  from 
those  just  described.  There  is  also  a  rounded  unworked  space  between 
two  of  the  facets.  Plate  43,  figure  6,  is  a  piece  of  scoria  with  three 
sides  and  the  smaller  end  smoothed  down. 
Plate  43,  figure  7,  is  a  block  of  basalt  with  the  two  larger  surfaces 
smoothed.  Unlike  the  rubbing  stones  described  above,  on  which  the 
sides  were  smoothed  down  to  a  perfect  plane,  there  is  here  a  slight 
concavity  of  the  smoothed  surfaces,  indicative  of  a  whetstone.    The 
